Question

If I were to start with $50 and add $20 each week for 12 weeks, what is an equation that represents the relationship between the dollar amount and the number of weeks?

Answer 1

This is a function y = mx + b:

• You start with $50, so the y-intercept(b) is 50.
• Adding $20 a week means that the slope(m) is 20.

So, the function would be y = 20x + 50, where y is the dollar amount after x weeks and x cannot be greater than 12.