Using proportions, it is found that Noah would be charged $40 each month for his cell phone bill each month if he stopped using auto pay.
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
He paid a total of $280 during 8 months, hence the monthly amount he paid is given by:
M = 280/8 = $35.
Without the discount, he would have paid $5 more, hence Noah would be charged $40 each month for his cell phone bill each month if he stopped using auto pay.
More can be learned about proportions at https://brainly.com/question/24372153
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