Question

Suppose that y varies directly with x, and y = 5 when x = 20 .

(a) Write a direct variation that relates x and y.

(b) Find y when x = 8

Answer 1

First place y/x and the equation would be 5/20 = y/8 because the y is not given then cross multiply 5 and 8 and divide that by the 20 your answer is y=2

Answer 2

y=2

Explanation:

This is because 5/20 can be reduced to 1/4. This means if the ratio is 1/4 then you can times it by 2 and get 2/8. Therefore the answer for y whould be 2.