Aline with a slope of 3, passing through the points (2,2)

Slope-intercept form:
y=mx+b
m=slope
b=intercept form

Data:
m=3
(2,2)  then x₀=2  and  y₀=2

We have to find "b";

y=mx+b
2=3(2)+b
2=6+b
b=2-6
b=-4

Therefore:
y=3x-4

y=3x-4

The answer is 225 miles per 4.5 hours. hope this ; )