Question

A direct variation function contains the points (2, 14) and (4, 28). Which equation represents the function?

y = x/14
y = x/7
y = 7x
y = 14x

Answer 1

@dumbcow

Answer 2

2 times what is 14 ?

Answer 3

The general way the books tell you to solve these, is to use the direct variation thing

y = k*x and use your points (x,y) in there to figure out what k is.

Answer 4

@dumbcow 7

Answer 5

(x,y) = (2,14),

x=2 and y=14

Put that into

y = k*x

Answer 6

14 = k*2

k = 7

y = 7x

Answer 7

there you go ..... its multiplying by 7

Answer 8

That is the basic way to solve the direct variation problems, use

y = k*x put a given point in, and find out what 'k' is