Answer:
The equation of the best line of fit is y = 2x
Step-by-step explanation:
The relationship between y and x is
y = mx + c
Where m = slope of the line
And c = intercept
At 50 miles per hour she has already covered a distance of 100 miles ---- from the graph
We can use this to calculate the slope of the line using the coordinates (0,0) (50,100)
Slope m is calculated as;
m = (y2 - y1)/(x2 - x1)
Where y2 = 100, x2 = 50
y1 = x1 = 0
Substitute these values
So m = (100 - 0)/(50 - 0)
m = 100/50
m = 2
Since there's no intercept, c = 0
The equation y = mx + c becomes
y = 2x + 0
y = 2x
