Answer:
y = 8/5 x + 24
Step-by-step explanation:
To get an equatio for the best line of fit, we will have to loacte two coordinate points on the line first. Using the coordinate points (10, 40) and (35, 80)
The general equation of a line is expressed as y = mx+b
m is the slope
b is the y intercept
Get the slope m
m = y2-y1/x2-x1
m = 80-40/35-10
m = 40/25
m = 8/5
Get the y-intercept
Substitute m = 8/5 and the point (10,40) into the equation y = mx+b
40 = 8/5(10) + b
40 = 16+b
b = 40 - 16
b = 24
Get the required equation using y = mx+b
y = 8/5 x + 24
This gives the required equation