Residuals and Quadratics

Shown is a residual plot. How many positive residuals are there?

• 5

• 1

• 3

• 9

• This residual plot represents a linear fit.
• This residual plot represents a nonlinear fit.
• This residual plot represents no fit.

• This residual graph represents a linear fit.
• This graph represents a nonlinear fit.
• This residual graph represents no fit.

Which of the following represents a quadratic function?

Which answer choice describes  y = -3x² +7x - 2 accurately?

• opens up with a maximum

• opens up with a minimum

• opens down with a maximum

• opens down with a minimum 

Shown is a residual plot. How many negative residuals are there?

• 5

• 1

• 3

• 9

I predicted someone would score a 78% on their test, but they actually scored an 81%. What's the residual?

• 81 - 78 = 3

• 78 - 81 = -3

• What's residual?

The height of a plant is measured each week after the first sprout shows above the soil. A botanist tries to predict the height of the plant in the upcoming weeks using the observed data in the table below. Which week has the smallest residual value?

• 1

• 3

• 4

• 6

The table below shows the number of chickens on a farm in different years. What is the residual value for the year 2007?

• 0.8

• 0.5

• -0.2

• -0.3