Unit 1B Review - Linear Functions

Select ALL statements that are true about about the graph of the linear equation

y = -9x + 4

• The slope is negative.

• The slope is positive.

• The line will cross the y-axis at a negative value.

• The line will cross the y-axis at a positive value.

Convert the equation to slope-intercept form:

4x + 2y = 18

• y = -2x+ 9

• y = 2x + 9

• y = -4x + 18

• y = 4x + 9

What is the slope and y-intercept of the line

5x - 3y = 15?

Solve for y FIRST!

• slope: 5; y-int: 15

• slope: 5/3; y-int: 15

• slope: -5/3; y-int: 5

• slope: 5/3; y-int: -5

Which equation models the same relationship?

• y = -2x + 140

• y = 2x +140

• y = -10x + 70

• y = -20x - 140

What is the domain of the function?

• all real numbers

• all real numbers greater than or equal to zero

• all whole numbers greater than 0

• all whole numbers greater than 8

Which equation best describes the function?

• y = x + 9

• y = 9x

• y = 10x + 9

• y = 9x + 10

A carnival charges $10 for parking and $3 per ride, modeled by the equation

y = 3x + 10

Which statement is TRUE?

• The total cost will increase by $3 for every ride.

• The total cost will increase by $10 for every ride.

• The total cost will increase by $3 for every 10 rides.

• The total cost will increase $10 for every 3 rides.

A mechanic charges $48 per hour, plus a one-time fee of $60, shown by the equation

y = 48x + 60.

What does the x represent?

• the amount charged per hour

• the number of hours worked

• the one-time fee

• the total amount charged

Which function represents the sequence in the table?

• $a_n=a_{\left(n-1\right)}+2$

• $a_n=a_{\left(n-1\right)}+4$

• $a_n=2a_{\left(n-1\right)}-1$

• $a_n=2a_{\left(n-1\right)}-4$

Which value of 'x' would make this relation NOT a function. Choose all that apply.

• 0

• -3

• 1

• 4

• 8