Question

This scatter plot shows the data collected by measuring the amount of water in a tank every 15 minutes. What is the equation of the line of best fit?


A: y= -4/3x+120

B: 4/2x+120

C: -3/4x+60

D: -4/3x-60

E: -3/4x-120

Answer 1

Answer:

  A:  y= -4/3x+120

Step-by-step explanation:

The blue line on the plot has a y-intercept of +120, matching choices A and B only.

The line has a negative slope, matching choice A. If you count grid squares, you find the slope is -40/30 = -4/3, also matching choice A.

Answer 2

Answer:

 A:  y= -4/3x+120