When y varies proportionally with x, what is k when x = 50 and y = 375?

2\15

7.5

5.5

10\75

When y varies proportionally with x, we have the equation y = kx where k is the constant of variation.

To find k, we can substitute the given values of x = 50 and y = 375 into the equation and solve for k.

375 = k(50)

Dividing both sides of the equation by 50:

375/50 = k

7.5 = k

Therefore, when x = 50 and y = 375, the value of k is 7.5.