Question

The value of y varies directly with x, when y = 4, and x = 9. What is the equation for the relationship?

Answer 1

Answer:

y  =  $\frac{4}{9}$x

Step-by-step explanation:

Given parameters:

  y  = 4

   x  = 9

y varies directly as x ;

  Mathematically ;

            y ∝ x

So;

            y  = kx

k is the constant of proportionality;

  find k;

             k  = $\frac{y}{x}$  

             k  = $\frac{4}{9}$  

So,

  Equation of the relationship is;

            y  =  $\frac{4}{9}$x

Answer 2

Yeah I think her answer was correct