Question

If y varies directly as x and y =72 when x =8 find x were y =65

Answer 1

For a direct relation, y = kx, k being a constant.

For your problem, just plug in the numbers.

(72)= k(8), k=9

So, using this plug k into the equation to find x when y =65. 65=9x, x would equal 65/9.