Answer:
35
Explanation:
y = 25 and x = 5
When two variable quantities have a constant ratio their relationship is called a direct variation. The formula for direct variation is y = kx, where k is called the constant of variation. If we know k we can find y given x or we can find x given y.
If we solve the equation y = kx for k, we get k = y/x. If we replace the variables x and y with the actual values from the problem we have:
k = 25/5, which is 5.
Now we can substitute this value for k into the equation y = kx to find y when x is 7:
y = (5) (7)
y = 35