Hello,
Please, see the attached files.
Thanks.
Given:
hours parking charge
4 5.50
7 7.75
7 - 4 = 3 hours
7.75 - 5.50 = 2.25
2.25 / 3 = 0.75
0.75 is the change in amount for every hour spent. It is the variable unit rate
4 hours is 5.50.
Cost of parking for 3 hours is: 5.50 - 0.75 = 4.75
0.75 x 4 hours = 3
5.50 - 3 = 2.5 fixed charge.
total parking charge: y = 2.50 + 0.75x
Simple, plug n chug...

t=2
u=-8
v=-0.5
Now, plug in what you have,


Now,
2-16=-14
Thus, your answer, -14.
The correct answer is “hasn’t” probably maybe