Question

If y varies directly as x, and y=10 when x=20, find y when x=3

Answer 1

y = -7

Explanation:

If y = 10 when x = 20, then we can find the difference when we do y + 1 = x + 1, which is 11 = 21. Therefore, the difference between x and y is 10. So, we need to do 3-10, which gives us -7.