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Granny Day has signed up for a new cell phone plan! She hs decided to get with the current world and learn to text! For the plan she chose, her monthly cost is $ 22.00 plus $ .75 for each text messages over 150 text messages.
What equation could be used to determine the total cost of her monthly cell phone bill, y, if she sends x text messages?
Make it a piecewise-defined function:
Cost = $22.00 .........., 0<= x <=150
.....= $22.00 + 0.75x .., x > 150