Answer:
Explanation given below.
Step-by-step explanation:
The first step is to put the parabola in the form
, which is the <em>standard form of a parabola</em>
<em />
<u>Note:</u> a is the coefficient before x^2 term, b is the coefficient before x term, and c is the independent constant term
The axis of symmetry divides the parabola symmetrically. The axis of symmetry has the equation 
Where <em><u>a and b are the respective values shown above</u></em>
<em><u /></em>
So, that is how you get the axis of symmetry of any parabola.
Answer:
108.4
Step-by-step explanation:
Answer:
25 miles per hour
Step-by-step explanation:
Given



The joint variation can be represented as:

Where:

Required
Find V, when: 
We have:

Express as an equation

Where k is the constant of variation
Make k the subject

When: 
We have:



When: 
We have:

Substitute:
and 

Make V the subject



Since f(-2) means that our x-value is -2, we can go to that position on the graph and slide up the y-axis to find the intersection this point has with the function graphed.
If I am correct the answer should be that the y value is 2!