Question

Suppose y varies directly with x, and y=10 when x=-5, find x when y=12

Answer 1

According to the given data y varies directly with x

So, y=kx

if y =10, and x=-5

Then:

10=k*-5

k=-2

So, the value of x when y=12 would be calculated as follows:

y=k*x

12=-2*x

x=12/-2

x=-6

Therefore the value of x when y=12 would be -6