Ineed to know if im correct

!

you divide the cost ($15) by the quantity (6) to get your questions answer. the yo-yo costs $2.50. hope this : )!

step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

$12. that is my answer.

1. perpendicular

2. parallel

3. perpendicular