Brittany started babysitting. She started off with $15 in her account, and her babysitting rate is $10 an hour. The first week she babysat, she worked for 4 hours. The second week she baby sat, she worked 6 hours. The third week she babysat for 2 hours. If in the fourth week she babysits for 8 hours, how much total money will she have?

look at photo

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)