Question

the graph shows the relationship between the total cost and the number of gift cards that raj bought for raffle prizes. what would be the cost for 5 of the gift cards? $80 $90 $100 $110

Explanation:

Step1: Identify the pattern

From the graph, when \( x = 1 \) (1 gift card), \( y = 20 \); \( x = 2 \), \( y = 40 \); \( x = 3 \), \( y = 60 \); \( x = 4 \), \( y = 80 \). So the cost per gift card is \( \frac{20}{1}=20 \) dollars per card.

Step2: Calculate cost for 5 cards

Using the rate (20 dollars per card), for 5 cards, cost \( y = 20\times5 = 100 \) dollars.

Answer:

\$100