Question

The question is : Find the constant of proportonially. Constant Of proportionally=y/x for any point of the line

Answer 1

First it is needed to find the slope with the following equation

$m=\frac{y2-y1}{x2-x1}$

We take two points of the line. (10,50) and (3,15)

Then you substitute them on the equation

$\frac{50-15}{10-3}=\frac{35}{7}=5$

The answer would be 5 gal/min