A store sells cooking oil of two different brands in bottles of the same size. The table below and the equation each show the price (y), in dollars, of different number of bottles of oil (x):

Question

Brand A
Number of Bottles, x Price (dollars), y
2
26
3
39
4
52
5
65
Brand B
y = 16x

How many dollars more is the price of 7 bottles of brand B oil than the price of 7 bottles of brand A oil? (5 points)

A: $3

B: $10

C: $21

D: $29

Answer 1

To find the price of 7 bottles of brand B oil, we can use the equation given for brand B: y = 16x

Plugging in x = 7, we get: y = 16 * 7 = 112

Therefore, the price of 7 bottles of brand B oil is $112.

To find the price of 7 bottles of brand A oil, we can look at the table for brand A. Since the prices increase by $13 for each additional bottle, the price for 7 bottles will be 65 + (6 * 13) = 65 + 78 = $143.

The difference in price between 7 bottles of brand B oil and 7 bottles of brand A oil is $143 - $112 = $31.

Therefore, the answer is not provided in the options.