Sexy Singles

Okay, it's late one Saturday night, you're feeling lonely and you wish you had someone to talk to, when all of a sudden the following commercial comes on the T.V. You decide to call the number and this is what you hear:

0-10 minutes Free
10-50 minutes $30.00
50-100 minutes $50.00
100-250 minutes $100.00

Write a step function for this information and graph it.

Click here for the solution!