Line of Best Fit

The scatter plot and line of best fit below show the length of 10 people's femur (the long leg bone in the thigh) and their height in centimeters. Based on the line of best fit, what would be the predicted femur length for someone with a height of 148 cm?

• 38.5 cm

• 25 cm

• 42.5 cm

• 36 cm

A line of best fit was drawn to the plotted points in a data set below. Based on the line of best fit, for what y-value does x=4?

• y = 6

• y = 10

• y = 8

• y = 4

What is the slope of the line of best fit?

• m = 4/5

• m = -4/5

• m = 5/4

• m = -5/4

What is the slope of the line of best fit?

• m = 5/2

• m = 2/5

• m = -2/5

• m = 5

What is the best interpretation of the slope of the line of best fit?

• For every 5 degrees the high temperature goes up, the amount of hot cocoa sold goes down by 4.

• For every 4 degrees the high temperature goes up, the amount of hot cocoa sold goes down by 5.

• For every 5 degrees the high temperature goes up, the amount of hot cocoa sold goes up by 4.

• For every 4 degrees the high temperature goes up, the amount of hot cocoa sold goes up by 5.

What is the best interpretation of the slope of the line of best fit?

• The weight of a catfish increases by 2 pounds for every 1 inch in length.

• The weight of a catfish decreases by 2 pounds for every 1 inch in length.

• The weight of a catfish increases by 1 pound for every 2 inch in length.

• The weight of a catfish decreases by 1 pound for every 2 inch in length.

What is the y-intercept of the line of best fit?

• b = 92

• b = 0

• b = 4/5

• b = 10

What is the y-intercept of the line of best fit?

• b = 54

• b = 0

• b = 2.5

• b = 10

What is the best interpretation of the y-intercept?

• When 0 hours are spent on homework per week the predicted quiz score is 54%.

• When 54 hours are spent on homework per week the predicted quiz score is 0%.

• The y-intercept does not make sense.

Which is the best interpretation of the y-intercept?

• When the temperature is 0 degrees Fahrenheit, 92 hot cocoa are sold.

• When the temperature is 92 degrees Fahrenheit, 0 hot cocoas are sold.

• The y-intercept does not make sense.