Create equations in two or more variables, graph them, and label axes/scales appropriately.
Write a two-variable equation using a constant rate
Problem
Each ticket costs \(\$12\). Write an equation relating the number of tickets \(t\) to the total cost \(C\).
Big Picture
What this problem is really about
This is a proportional relationship: every ticket contributes the same amount to the total, and there is no starting charge. We’ll treat the ticket count as the input and total cost as the output, then multiply the per-ticket rate by the count. That product gives an equation that works for any number of tickets.
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