Question

A data set consists of the following data points:

(2,4), (4,7), (5,12)

The line of best fit has the equation y =-1.5+2.5x. What does this equation predict for a value of x=3?

Answer 1

Take the equation for the line of best fit and substitute 3 for x.
Crank out the value of y that goes with that x.
That will be the predicted value.

y =-1.5+2.5x

y = -1.5 + 2.5*3

y = ?

Post what you get, okay?

Answer 2

6?

Answer 3

That is what I got, 6.

Answer 4

Cool, thanks!