how do u do this???

Question

with the direct variation forula, solve for k using the point (-4,8). then, write the equation of the direct variation.

Answer 1

If y varies directly with x, then x and y are related by

y = k*x

for some constant k.

For the point (-4, 8), we have

8 = k*(-4) so k = -2

and so

y = -2x