Which situation can be represented by the equation y = 5x? A-A restaurant sells x number of sandwiches for $5.00 each. The cost is y, for x number of sandwiches.
B-Manuel has driven a car for x years. This is 5 times y, the number of years his mother has driven a car.
C-Meg is x, years old. Her age is 5 years greater than y, her brother's age in years.
D-Wally spent x dollars to buy a pizza for his sister. He gave the cashier y dollars and received $5 back in change

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step-by-step explanation:

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option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6