Scatterplot Equations

• A.
• B.
• C.
• D.

• y= -8/7x +1

• y= 7/8x+1

• y= 8x+1

• y= 8/7x+1

• graph 1
• graph 2
• graph 3
• graph 4

the slope is -5/7, what does that mean?

• gain 5 hour of sleep for 7 cups of coffee

• lose 5 hours of sleep for 7 cups of coffee

• lose 7 cups of coffee for 5 hours of sleep

• lose 5 cups of coffee for 7 hours of sleep

A restaurant sells pizza for the prices in the data table. Calculate the linear regression equation of the data.

• y = 3/2x + 12

• y = 12x + 1.5

• y = 2/3x - 8

• y = -8x + 0.67

• y = 2/3x + 12

Tags

Statistics

Line of Best Fit

A researcher gathered data to predict the number of new types of plants (y) that will be in a state park after x years.  After making a scatter plot of the data, she determined the equation of a line of best fit to be
y = 0.25x + 8
Based on the equation, what is the number of new types of plants that will be in the park after 24 years?

• 8

• 14

• 32

• 64

Tracy and her family moved to the city in 2003. Use the equation to predict how many retail stores there were in 2003. 

• 173

• 155

• 143

• 36

• As the age of the car increases, the asking price increases.

• As the age of the car increases, the asking price decreases.

• The age of the car does not affect the asking price.

• The asking price consistently decreased by $10,000 per year.

The table shown is comparing a person's foot length to their height in cm. Calculate a linear regression equation.

• y = 25.05x + 5.57

• y = 5.57x + 25.05

• y = -5.57x + 25.05

• y = 5.57x - 25.05

Find the quadratic regression equation for the relationship of the horizontal distance and the height of the ball.

• y= -18x² + 2.11x + 4.21

• y= -.06x² +1.06x + 7.9

• y= -6x² +1.06x + 79

• y= -.12x² + 2.11x + 4.22