Answer
Rise/run = 20 miles/gallon
The equation of the line is y = 20x
Check Explanation for more.
Explanation
The rise-run is another name for the slope.
For a straight line, the slope of the line can be obtained when the coordinates of two points on the line are known. If the coordinates are (x₁, y₁) and (x₂, y₂), the slope is given as
[tex]Slope=m=\frac{Change\text{ in y}}{Change\text{ in x}}=\frac{y_2-y_1}{x_2-x_1}[/tex]
For this question,
(x₁, y₁) and (x₂, y₂) are (3, 60) and (4, 80)
x₁ = 3
y₁ = 60
x₂ = 4
y₂ = 80
[tex]\text{Slope = }\frac{80-60}{4-3}=\frac{20}{1}=20[/tex]
The equation of the line is y = 20x
Hope this Helps!!!
