Question

Which equation BEST represents the line of best fit for the scatterplot?

A) y = 2.5x + 25
Eliminate
B) y = −2.5x + 20
C) y = −0.05x + 20
D) y = −0.005x + 22.5

Answer 1

B
at first we need a negetive gradient

at second we need the more valuance gradient

Answer 2

The right answer is: D\

Because y = −0.005x + 22.5

Choose 2 points to find the slope: (1500, 12.5) and (1000,15)

15 − 12.51000 − 1500 = −0.005

Also, the y-intercept is approximately 22.5.

y = −0.005x + 22.5 is correct, which is D.