# Which is an equation of a direct proportion? CLEAR CHECK y=8x y=12x+4 y=12x y=4x−4

Question

Which is an equation of a direct proportion? CLEAR CHECK y=8x y=12x+4 y=12x y=4x−4

in progress 0
1 year 2021-08-31T01:44:35+00:00 1 Answers 17 views 0

## Answers ( )

1. Answer:

$$y=8x, \\y=12x$$

Step-by-step explanation:

Proportional functions can be written as $$y=kx$$, where $$k$$ is some constant of proportional. Since directly proportional functions always pass through the origin, the y-intercept must be 0 (no additional number before or after $$x$$ term). The only answers that fit this format are:

$$\rightarrow \boxed{y=8x}\\\rightarrow \boxed{y=12x}$$