8th Grade Extra Credit is due April 8, 2013

1. Find a relative that has a cell phone. Ask them about the initial cost of the cell phone and the charge per minute. Create an equation based on the information calling it C, in the form: C = mx + b. Find a different relative that has a cell phone. Ask them about their initial cost of the cell phone and the charge per minute. Create a second equation based on the information calling it C'', in the form: C'' = mx + b. 2. Watch the video below. 3. Just as we did in class, set the two equations equal to each other, find the value of x (in minutes). 4. Now, take that value of x and plug it into C or C'' to get the cost. 5. Create a graph and graph the two equations similar to Mr. Taylor's sample problem. Watch the video below for an idea of what to do.