Answer:
D.
Step-by-step explanation:
it should be the sales tax because you pay a little bit more.
Parenthesis ()
Exponents x²
Multiplication ×
Division ÷
Addition +
Subtraction -
4
Constant of proportionality refers to the slope of the line in this case, the slope of the line is (4-0)/(1-0)=4
I''m pretty sure it's A
They are all true
