i don't know how to get the equation right

Question

Mia had $22. Then she started to receive $4 a week as an allowance. She plans to save all of her money for a bicycle and draws a graph of her planned savings. Mia lets x represent the number of weeks she has received her allowance, and y represent her total amount of money. Which of the following ordered pairs is on Mia's graph?

Answer 1

Hi there! We know she starts out with 22 flat, that amount doesn't change. Then, for each week she earns an additional $4. So, we can multiply the number of weeks "x" by 4 to find out how much additional she will get. From all of this info we can create the following equation:

y = 4x + 22

To find which ordered pair works, you can plug the x-coordinate in for x and the y-coordinate in for y. If they equal each other, the ordered pair will be on the graph. Please don't hesitate to reach out with any additional questions that you may have! :)