4x−5=7+4y
subtract 7 from both side
4x - 5 -7 = 4y
4x -12 = 4y
divide by 4
4x/4 -12/4 = 4y/4
x-3=y
the question says that the samples included 100 people each, so it's just 100 multiplied by the amount of samples:
7×100=700
If he paid $57 monthly for 14 months, the total amount paid is:

He paid $798 in total
I believe the answer is A! I hope that's correct! :)
Answer:
The last one.
Step-by-step explanation:
The solutions with the horizontal lines are wrong because then h(x) would be -1 and 1 respectively.
The subtlety is in the open or closed dot. x ≥ -1 means that -1 is included, which is drawn as a closed dot. x < -1 means that -1 is excluded, which is drawn as an open dot.
Hence the last graph is the correct one.