Question

The variables x and y vary directly. Write an equation that relates x and y, when x = 4 and y = 2.

Answer 1

what do you mean by vary directly?

Answer 2

not sure exactly, it's part of the problem.

Answer 3

y=x-2

plug in to check: (4,2)
2=4-2
2=2

atleast, I think that is what it is asking for O.o

Answer 4

A. y = -2x
B. y = -1/2x
C. y = 1/2x
D. y = 2x

Answer 5

so A?