Answer:
y=3x
Step-by-step explanation:
x is number of cups, and one cup is 3 dollars, so 3 times x is the amount of earnings Amanda would earn
for example:
Lets say Amanda sold 9 cups of lemonade, and each cup is 3 dollars
if you plug the numbers into the equation it would look like: y= 3 x 9
her earnings would be 27 dollars.
hope this helps!