Question

Which equation represents a direct linear variation?

A.
y = x – 3

B.
y = 1/x

C.
y = 1/3 x

D.
y = x^2

Answer 1

@SolomonZelman

Answer 2

direct linear equation would mean that y intercept is equal to zero.

A is going through (0,-3) and not through the origin. B is an inverse variation equation. C (if x is not part of the denominator) is a direct variation, in other words a line that goes through the origin. D is an exponential function that goes through the origin.

Answer 3

also direct linear equation must be a line.

Answer 4

That would make it C, right? Since it is a line that goes through its origin?

Answer 5

yes C.

Answer 6

Thank you! :)