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4-80.

What is the Science Club's starting point?
(y-intercept or b)

How much does their balance increase every week?
(growth rate or m)

Put this into equation (y = mx + b) format.

Follow the same steps to find an equation for the Math Club.

What are the x- and y-values of the point where the two lines intersect?

Use the eTool below to help you with this problem.

Click on the link at right for the full eTool version: AC 4-80 HW eTool