Answer: Minimum for $150: 2 Hours
Step-by-step explanation: First, Tiffany charges $30 per additional child. If she babysits for 4 children, you do 30 x 4, which is equal to 120. That would be the cost for the children. Now, if she charges $15 PER HOUR, then you just add up $15 + $15, which is $30, and you add that $30 to the $120. Which is $150. There you have it. If this is wrong, correct me please!
9/12 chose Friday or Saturday. That reduces to 3/4. Which is also 75%. Hope that helps.
Y2-y1/x2-x1. so -7-8/-1-(-1)= -15/1
