Question

Which equation is a direct variation equation that has (3, 18) as a solution?
a) y = 2x(squared)
b) y = 1/6x
c) y = 6x
d) y = 4x + 6

Answer 1

Would I plug in the points?

Answer 2

y=kx is the formula for direct variation

You have (3,18) as one coordinate pair

Answer 3

solve for k

Answer 4

Would it be c?

Answer 5

yes :)

Answer 6

Okay awesome. Thank you. By the way.. how are you so smart??

Answer 7

idk, I like doing competition math. check out this website: http://floridamao.org/PublicPages/TestArchive.aspx

Answer 8

the math tests there are pretty difficult