Ch 8 PM3 Review Day 1

​Ch 8 PM3 Review Day 1

Multiple Choice

Determine the slope and y-intercept.   y = 3/2x + 3

• slope: 5   y-intercept:  (0,3) 
• slope: 3/2   y-intercept:  (0,3) 
• slope:  4  y-intercept:  (0,3/2)
• slope: 1/5   y-intercept:  (0,5) 

Multiple Choice

Write the equation for the line.

• y= -1x+3
• y= 4x+3
• y=(1/4)x+3
• y= -4x+3

Multiple Choice

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase.

• As the temperature increases, the number of visitors increases.

• As the visitors increase, the temperature decreases.

• No correlation

Multiple Choice

What represents the y axis?

• ABC Company
• Hours Worked
• Amount Earned in Dollars
• Hours in Car

Reminders

***Association and Correlation are the same thing!!!

Multiple Choice

Based on the scatterplot, which of the following conclusions about the relationship between her height and weight is true?

• There is a negative relationship between height and weight

• There is a positive relationship between height and weight

• There is a constant relationship between height and weight

• There is no relationship between height and weight

Multiple Choice

What type of correlation does this scatter plot show?

• positive

• negative

• no correlation

• nonlinear association

Multiple Choice

What is the type of association?

• Negative 

• no association

• positive 

What is the Line of Best Fit or Trend Line?

• It is used in scatter plots.

• It is a linear function.

• It follows the trend of the data, which means it goes the same direction as the points.

• It divides the points approximately half way.

Multiple Choice

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• There is no line of best fit for this graph

Multiple Choice

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

​How to make the line of best fit and write the equation for that line:

​Step 1: Fit a straight line with _____ the data points above and _____ the data points below.

Step 2: Find 2 things _______ and _______.

Step 3: Use slope equation and _____ points from the graph to get slope if you can't "count" the slope.

Step 4: Write the equation in y = mx+b form.

Multiple Choice

Which equation is the best for the line of best fit shown?

• y = -1/2x + 9

• y = -0.59x +9

• y = 1/2x + 9

• y = 0.6x + 9

Multiple Choice

What is the equation for the line of best fit?

• y = -0.57x + 10

• y = -2.93 x + 10

• y = 0.57x + 10

• y = 2.85x + 10