Ok... so this question can be solved by using simultaneous equations.
Use the general from of a parabola

you know the value of c, the y-intercept... y = -4
which means the equation is

now use the other 2 points to get 2 equations in 2 unknowns
(-2, -20) just substitute

this becomes

now the other equation using (4, -20)
The simplified form is
590.4
I believe let me know if it wrong
Answer:
a. -7 + 3
b. draw 7 negatives + 7 positives
Step-by-step explanation:
Subtract 60-5 which would be 55, then divide 55 by 1.25 which would be 44 rides