Question

Rashid thought about all the bills that his family needed to pay and wondered what the function would be if the situation changed so that on day 0, they owed $10 and then added a dollar a day.

Write the explicit equation and graph the function that models this situation.

Answer 1

y = -x - 10

Explanation:

set y as the total money owed

set x as how many days passed

if 0 days are passed, they owed $10, which is "-10" the y-intercept

and owed $1 more everyday which is -1x. We can write it as -x.