Use the information in the problem to set up
y = mx + b equations for both Frank and John.
Set the equations equal to each other and solve for x.
Substitute x back into one of the original equations and solve for y. Check that x and y work in both equations.
Define your variables.
y = total weight (lbs)
x = time (weeks)
m = weight growth each week (lbs/week)
b = starting weight (lbs)
Use the eTool below to solve the problem by completing tables and graphing.
Click on the link at right for the full eTool version: AC 5-68 HW eTool