Question

Jasmine will buy the same number of stamps every month to add to a stamp collection her grandfather gave her. The table shows the number of stamps Jasmine will have at the end of x months. How many stamps was Jasmine given, and how many stamps will she buy every month?

Jasmine was given 65 stamps, and she will buy 5 stamps every month.

Jasmine was given 60 stamps, and she will buy 65 stamps every month.

Jasmine was given 5 stamps, and she will buy 60 stamps every month.

Jasmine was given 60 stamps, and she will buy 5 stamps every month

Answer 1

Option (4)

Explanation:

If we draw a graph against x(Number of months) and y(Number of stamps),

We will get a straight line.

Let the equation of straight line be,

y = mx + b

Here, m = Stamps purchased per month

b = Jasmine was given stamps initially

From the table attached,

m =
`(70-65)/(2-1)` = 5 stamps per month

Therefore, equation of the line will be,

y = 5x + b

Since, a point (1, 65) lies on this line,

65 = 5(1) + b

b = 60

That means she was given 60 stamps initially.

Option (4) will be the answer.