Question

at a flea market, used computer games are sold at the prices shown in the table below.

number of games | price ($)
2 | 9.00
5 | 22.50
7 | 31.50

do the number of games and price form a proportional relationship?
choose the correct response.

• yes. there is a constant of proportionality of $11.25.
• yes. there is a constant of proportionality of $4.50.
• no. there is not a constant of proportionality.
• no. the slope is 4.5.

Explanation:

Calculate unit rates for each row

$$
LATEXBLOCK0
$$

Determine proportionality and constant

$$
LATEXBLOCK1
$$

Answer:

• Yes. There is a constant of proportionality of $11.25.
• Yes. There is a constant of proportionality of $4.50. (Correct answer)
• No. There is not a constant of proportionality.
• No. The slope is 4.5.