A 1-topping large pizza costs $15, a large 3-topping pizza costs $20. Is this an example of direct variation? How do you know?

N O

Step-by-step explanation:

Because A direct variation is when x and y (or f(x) and x) are directly proportional to each other... For example, if you have a chart that says x and y, and in the x column is 1, 2 and 3, and the y column says 2, 4 and 6... then you know it's proportional because for each x, y increases by 2.

like 7 or 8

Step-by-step explanation:

ive tried this before i had a test with 50 questions i got a 70%, so maybe 6 or 7