2. Main Idea and New Vocabulary
Example 1: Real-World Example: Translate a Graph into an Expression
Example 2: Real-World Example: Translate a Graph into an Expression
Key Concept: Tables and Graphs
Lesson Menu

3. Translate information in graphs to expressions.
linear
Main Idea/Vocabulary

4. Translate a Graph into an Expression
HEALTH FOOD A health food store is having a sale. If you buy 1 pound of granola at full price, then each pound after that is on sale. The total costs of different amounts of granola are shown in the graph. Write an algebraic expression to represent the data in the graph.
Example 1

5. Translate a Graph into an Expression
Write the ordered pairs in a table.
The common difference of 1.50 implies that the expression is 1.50f. But you need to add 2.50 to get the total cost. The expression is 1.50g
Answer: 1.50g
Example 1

6. PIZZA A pizza shop is offering a special deal
PIZZA A pizza shop is offering a special deal. If you buy 1 pizza at full price, then each pizza after that is on sale. The total cost of different numbers of pizzas is shown in the graph. Write an algebraic expression to represent the data in the graph.
A. 5p
B. 8.50p + 5
C. 5.50p + 8
D. 8p
Example 1 CYP

7. Translate a Graph into an Expression
HEALTH FOOD A health food store is having a sale. If you buy 1 pound of granola at full price, then each pound after that is on sale. The total costs of different amounts of granola are shown in the graph. Use the expression 1.50g to find the cost of 5.5 pounds of granola.
Example 2

8. Translate a Graph into an Expression
Evaluate the expression 1.50g when g = 5.5.
1.50g = 1.50(5.5) Replace g with 5.5.
= Multiply and 5.5.
= Simplify.
Answer: It will cost $10.75 to buy 5.5 pounds of granola.
Example 2

9. PIZZA A pizza shop is offering a special deal
PIZZA A pizza shop is offering a special deal. If you buy 1 pizza at full price, then each pizza after that is on sale. The total cost of different numbers of pizzas is shown in the graph. Use the expression 5p to find the cost of 8 pizzas.
A. $42.50
B. $46.00
C. $48.50
D. $52.00
Example 2 CYP

10. Key Concept