Answer:
y = 15x
Step-by-step explanation:
For every hour that has gone by, Marco biked 15 miles, therefore, the equation of the line that shows the relationship between the time, x, and the distance, y, is <em>y = 15x</em>.
is the answer.
This is because the slop is found by the difference of ys over the difference of xs.
It's called a rectangle. This is just a definition, so there is not much to explain.