Question

this question has two parts. first, answer part a. then, answer part b.
part a
the table shows the costs for different numbers of sandwiches. each sandwich costs the same amount.
number of sandwiches | cost ($)
--- | ---
3 | $12
5 | a
b | $28
9 | c
enter the correct answers to complete the table.
a =
b =
c =
part b
the table shows the costs for different numbers of sandwiches. each sandwich costs the same amount. plot the points on the graph to show the costs of sandwiches.

Explanation:

Step1: Find cost per sandwich

From the table, 3 sandwiches cost $12. So cost per sandwich is $\frac{12}{3} = 4$ dollars.

Step2: Calculate \( a \)

For 5 sandwiches, cost \( a = 5 \times 4 = 20 \) dollars.

Step3: Calculate \( b \)

Given cost is $28, number of sandwiches \( b = \frac{28}{4} = 7 \) sandwiches.

Step4: Calculate \( c \)

For 9 sandwiches, cost \( c = 9 \times 4 = 36 \) dollars.

Answer:

\( a = 20 \), \( b = 7 \), \( c = 36 \)