Question

Suppose y varies directly with x. Write a direct variation equation that relates x and y. Then find the value of y when x=7.

Answer 1

y = kx

Answer 2

y=15
when x=6

Answer 3

15 = k(6)

i think u should know it from now

Answer 4

it's 2.5

Answer 5

the next one is
y=-4
when x=4

Answer 6

That's great :D
Now that you have k, use this equation
y = 2.5x

and put x = 7

Answer 7

17.5...

Answer 8

Well, find k again, but this time, with the new values for y and x :)

y = kx

Answer 9

17.5

Answer 10

Ok i got it thanks guys :)

Answer 11

awsum!!!