Question

Melinda and Marcus are saving money to purchase a present for a friend. Each friend starts with an amount and also saves a specific amount each week.

Melinda created a table to show the total she has saved at the end of each week.
Weeks 0 5 10 15 20 25 30 35 40
Amount saved 75 135 195 255 315 375 435 495 555



Marcus came up with the following equation to show the total, y, he has saved at the end of each week, x.

y = 14x + 25



Compare the rate at which each friend saves money.



Select the correct answer from the drop-down menu to complete the statement.


The rate at which Melinda is adding to her savings each week is $
less than the rate at which Marcus is adding to his savings each week.

Answer 1

Explanation:

from Melinda's table it can be seen that the rate of increase of melinda's savings is $60 per week.

from marcus equation it can be seen that the rate of increase of marcus savings is $24 per week.

therefore the rate at which melinda is adding to her savings each week is 60-24=$36 more than the rate marcus is adding to is savings each week

Answer 2

From Melinda's table it can be seen that the rate of increase of Melinda's savings is $60 per week.

From Marcus equation it can be seen that the rate of increase of Marcus savings is $24 per week.

Therefore, the rate at which Melinda is adding to her savings each week is 60 - 24 = $36 more than the rate at which Marcus is adding to his savings each week.