The variables x and y vary directly. Use the values to find the constant of proportionality and write an equation that relates x and y. Write the equation in the form y=kx.

Question

y = 4; x = 6 is the first one, and  y = 2; x = 10 is the second one. I'm stumped on how to do this.

Answer 1

4 = 6k

k =2/3

y =2x/3

2 = 10k

k =2/10 = 1/5

y = x/5