Question

Find an equation of variation where y varies directly as x and y = 10 when x = 5, find y when x is 4.

Answer 1

If y increases x increases that's what this means so!
y1/x1 = y2/x2 [Another way of writing proportionalities varying directly]
SO
10/5 = y2/4
y = 8
Understood? :)

Answer 2

yessssssssss