Question

Suppose y varies directly proportional with "x" y=6 when x=8 Find y when x=10

Answer 1

Explanation:

directly proportional means

y = kx

to find k we use the first given pair (8, 6) :

6 = k×8

k = 6/8 = 3/4

so, for x = 10

y = 3/4 × 10 = 30/4 = 7.5