Question

If y is inversely proportional to x and y = 15 when x= 3 Find x when y = 5.

X=5
X=8
X=9
X=1

Answer 1

answer is 1

Explanation:

y∝x

y=kx

15=3k

divide 3 both sides

k=5

so y=5x

when y is 5

5=5×x

divide 5 both sides

x=1