A. The independent variable is time, as time is manipulating the value of her salary.
b. The dependent variable is her cost because what she charges for babysitting depends on how long she works.
c. y = 8x
y = how much she charges for this job
8 = the amount she charges per hour
x = number of hours babysat
Answer:

Step-by-step explanation:
He would need to sell 28 because
12.50*28=350 and 350+50=400
The answer to 1. Is c
The answer to 2. Is 176