I think your talking about quadratics, so 
They didn’t specify which way the parabola was translated, right or left, up or down?
Since there wasn’t specification of direction, I will use positive (to the right) and up (upwards)
a = 1/2
h = +5
k = +5
y = a(x-h)^2+k
y = 1/2 (x - 5)^2 + 5
Now if your writing it in standard form (above was vertex form) you’d just expand it
y = 1/2 (x-5)(x-5) + 5
y = 1/2 [(x^2) -5x -5x ] + 25 + 5
y = 1/2 x^2 - 5x + 30
        
             
        
        
        
Answer:
Part 1) Slope-intercept form
Part 2) The slope of 2.20 tells me the rate per mile and the y-intercept of 2.50 tells me the flat fee
Step-by-step explanation:
Part 1) we know that
The linear equation in slope intercept form is equal to

where
m is the slope or unit rate
b is the y-intercept or initial value
In this problem we have

This is a linear equation in slope intercept form
where


Part 2) we have that
x -----> represent the number of miles
y ----> represent the total charge in dollars
The slope is 
 ---> unit rate
 ---> unit rate
The y-intercept is
 ----> initial value or flat fee
 ----> initial value or flat fee
therefore
The slope of 2.20 tells me the rate per mile and the y-intercept of 2.50 tells me the flat fee
 
        
             
        
        
        
It is C, if it falls 14 ft. and it travels back up 7 ft. and then falls another 7 ft, and stops at the ground now you add it all up 14+7+7=28. hope that helps you.