1. **State the problem:** We need to find the total cost $c$ for $h$ hamburgers, where each hamburger costs 2.50. 2. **Write the formula:** The total cost is the price per hamburger multiplied by the number of hamburgers: $$c = 2.50 \times h$$ 3. **Fill in the table:** - For $h=1$, $c = 2.50 \times 1 = 2.50$ - For $h=2$, $c = 2.50 \times 2 = 5.00$ - For $h=3$, $c = 2.50 \times 3 = 7.50$ - For $h=4$, $c = 2.50 \times 4 = 10.00$ - For $h=5$, $c = 2.50 \times 5 = 12.50$ - For $h=6$, $c = 2.50 \times 6 = 15.00$ - For $h=20$, $c = 2.50 \times 20 = 50.00$ 4. **Explain the relationship:** The total cost increases by 2.50 for each additional hamburger. This is a linear relationship where the slope is 2.50. 5. **Graphing:** Plot the points $(1, 2.50), (2, 5.00), (3, 7.50), (4, 10.00), (5, 12.50), (6, 15.00)$ on the grid. - The horizontal axis (independent variable) is the number of hamburgers $h$. - The vertical axis (dependent variable) is the total cost $c$. **Final equation:** $$c = 2.50h$$