Well,
We are given a direct proportion problem.
x varies directly as y.

When y = -5, x = 15.

Now, we are told to find x when y = 3.

We just have to recognize that the complete case is equal to the incomplete case. In other words, we set the -3 equal to the x/3.

Multiply both sides by the LCM.
LCM of -1 and 3 = 3
-9 = x
When y = 3, x = -9.
Doubles facts is think of a number for example X, where X=1. Doubles is 2x which is 1*2=2, 1*2 is the same as 1+1. Its add the number to itself.
Answer:
A
Step-by-step explanation:
Speed = distance / time
Speed = 50 miles / 4 hours
Speed = 12.5 miles per hour