How do you determine if a graph shows a strong linear correlation between two variables?

If the points are roughly arranged in a line, there is a strong correlation.

If the points are randomly scattered all over, there is a strong correlation.

There can only be a strong correlation if the points perfectly form a line.

If the points never overlap, there's a strong correlation.

What is this question asking you to look for?

A table that always adds/subtracts by the same amount.

A table that always multiplies by the same amount

A table that multiplies by different amounts each time

A table with no negative numbers.

When solving an *inequality*, what should you do?

Solve like a normal equation but flip the inequality when multiplying or dividing by a negative.

Solve like a normal equation with no differences.

Plug in random values of x and see what happens.

Solve like a normal equation by flip the inequality when you add or subtract a negative number.

What ways can you solve this problem?

Distribute the 3 and -1 and subtract OR use y= and Table on your calculator.

Factor out a GCF and then use the trash method.

How can you solve a question like this?

Put into y= and see what x-values you see in the table

Put into y= and check what y-values you see in the table

Use the numeric solver on your calculator

You can find the roots of a function by:

Factoring OR using y= and looking for where y is 0 on the table OR quadratic formula

Completing the square OR distribution OR quadratic formula

Factoring OR using y= and looking for where x is 0 on the table OR quadratic formula

Plugging in 0 for x OR quadratic formula

How can you solve a question like this?

Make a list of the first 5 terms adding 3 each time OR use the explicit arithmetic formula you can find on your reference sheet

Make a list of the first 5 terms multiplying by 3 each time OR use the explicit geometric formula you can find on your reference sheet

How can you determine whether complicated functions like this are equivalent?

Put them in y= and compare tables

How do you know if something is a solution for a system?

It makes both equations true when you substitute.

It makes at least one equation true when you substitute.

The x and y have the same sign.

How should you solve a question like this?

Enter each dot (and its value) into L1 and do 1-var stats

Average the numbers 0, 1, 2, 3, 4, 5, and 6.

Add a few more dots to the graph.

Enter the dots in L1 and the number line in L2 and do linreg.

What are two (good) ways to solve this question?

Substitute to see if true and numeric solver

Completing the square and lin reg

How should you solve this question?

Put both into y= and compare tables

What is the best way to get full credit on a question asking if something is rational or irrational?

Perform the operation on your calculator and see if you can convert it into a fraction. If yes, it's rational. If no, it's irrational. Write the final number either way.

Do long division until it stops

What is the key idea that separates functions from non-functions?

No y value has more than one x value

All x values have at least one y value

There is a unique y value for every x value.

How do you know if an equation is a quadratic equation?

Its coefficients are all perfect squares

What is the degree of a polynomial?

The coefficient of the first term

The coefficient in front of the highest exponent

What is the constant term of a polynomial?

The coefficient of the first term

The coefficient in front of the highest exponent

What is the leading coefficient of a polynomial?

The coefficient in front of the highest exponent

The coefficient of the first term

What does the equation x = 3 look like when graphed?

A vertical line at where the x is always 3

A vertical line where the y is always 3

A horizontal line where the y is always 3

A horizontal line where the x is always 3

What does the equation y = 3 look like when graphed?

A horizontal line where the y is always 3

A vertical line at where the x is always 3

A vertical line where the y is always 3

A horizontal line where the x is always 3

When a function increases by a percent:

Convert the percent to a decimal, add it to 1, and use that decimal in your exponential function, y = ab^x

Convert the percent to a decimal and use that decimal in your exponential function, y = ab^x

Convert the percent to a decimal, subtract it from 1, and use that decimal in your exponential function, y = ab^x

When a function decreases by a percent:

Convert the percent to a decimal, subtract it from 1, and use that decimal in your exponential function, y = ab^x

Convert the percent to a decimal and use that decimal in your exponential function, y = ab^x

Convert the percent to a decimal, add it to 1, and use that decimal in your exponential function, y = ab^x

Which method of factoring should always be the first one you try?

Product/sum (the diamond method)

Regents Practice

Authored by John Sweeney

Mathematics

9th - 12th Grade

CCSS covered

Used 2+ times

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45 questions

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of these shows a quadratic function?

y = 4x + 2

y=|x + 4| - 5

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of these shows a linear function?

y = 4x + 2

y=|x + 4| - 5

Tags

CCSS.8.F.A.3

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of these shows an exponential function?

y = 4x + 2

y=|x + 4| - 5

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of these shows an absolute value function?

y = 4x + 2

y=|x + 4| - 5

Tags

CCSS.HSF-IF.C.7D

MULTIPLE SELECT QUESTION

2 mins • 1 pt

Which of these function(s) requires you to find the vertex when graphing?

y = 4x + 2

y=|x + 4| - 5

Tags

CCSS.HSF-IF.C.7A

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What ways can you solve this question?

Factor using trash method or use calculator graph

Factor using DOTS or use y= and Table on calculator

Factor using GCF and then factor with DOTS

Plug in 16 for x.

Tags

CCSS.HSA.APR.C.4

MULTIPLE CHOICE QUESTION

2 mins • 5 pts

How do you calculate average rate of change?

Subtract the high minus the low

Add up all the x values and all the y values and divide by the number of values.

Create a new table with only the low value of the interval and the high value of the interval. Then calculate slope.

Add up only the y values and divide by the number of values.

Tags

CCSS.8.F.B.4

CCSS.HSF.IF.B.6

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