Andre and 5 of his friends want to see a new movie. At the movie theater, the price of a ticket is $9. The equation yequals9x gives the price, y, of x movie tickets. What is the constant of proportionality? What is the total cost of the 6 tickets?
The constant of proportionality in this case is 9, as indicated by the equation y = 9x.
To find the total cost of 6 tickets, we simply substitute x = 6 into the equation:
y = 9 * 6
y = 54
Therefore, the total cost of 6 tickets would be $54.