What is the constant of proportionality of 1. y=2.0+ 0.5x

2.y=75x
3.y=55x

4.y=320-15x

5. y= 15/60 x+30

6.y=2.25
7.y=5x+3

8.y=3-0.6x
9.y=15+ 1/2x
10.y=65x

Thank you, no fake answers or links.
please do at least 5 .-.

I couldn’t add all my solotions but u can make another question so I can give it to u

Step-by-step explanation:

But this are just the graph tell me if u need solutions

$20.01

step-by-step explanation:

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