Question

If y varies directly as x, and y is 48 when x is 6, which expression can be used to find the value of y when c is 2?

Answer 1

Direct variation has the for y=kx  (inverse variation has the form y=k/x)

Since we are given a point we can solve for the constant of variation, k

48=6k so

k=8 so our equation is:

y=8x so

y(2)=8(2)

y(2)=16

So y=16 when x=2