What is the growth rate of her line? A graph of the line may help.
Growth rate: when
grows by , grows by .
What is the
-intercept of her line?
-intercept is where the line crosses the -axis.
One strategy is to use the slope triangle to continue the line and then simply read the
-intercept (where the line crosses the -axis) right off the graph. -intercept .
What is the equation of her line?
Use the rate of growth and the
-intercept to write an equation for the line. the rate of growth the -coordinate in the -intercept
Use the eTool below to complete the graph and help solve each part.
Click on the link at right for the full eTool version: 5-21 HW eTool