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A student started a babysitting business. She charges $10 per hour on the weekdays and $20 per hour on the weekends. Her parents only allow her to work 20 hours per week. Her goal is to make at least $250 per week.

Part A.
Some of equations or any qualities that model the situation. Define the variables you used.

Part B.
Graph the points that represent the number of hours a student can work during the week and weekend to meet her goal (remember to put it in Y=mx+b format)