GIVING BRAINIEST
Explain how u got your answer
Pick from 1. 2. And 3.

#2 is not a function

Step-by-step explanation:

Although there can be multiple y-values attributed to a single x-value, there can only be ONE x-value(of a number) in a function, so #2 would be incorrect seeing as it uses the x-value, 2, two times.

$20.01

step-by-step explanation:

the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.

i think asking google will you get the answer to that question