The answer is A because the same rule applies
The directrix of the parabola is 
<h3>How to determine the equation of the directrix?</h3>
The parabola equation is given as:

A parabola is represented as:

By comparing both equations, we have:
4p = 1/4 ==> p = 1/16
-k= 3 ==> k = -3
The directrix is represented as:
y = k - p
So, we have:

Take the LCM

Evaluate

Hence, the directrix of the parabola is 
Read more about parabola at:
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Answer:
2/3
Step-by-step explanation:
The rate of change is the same thing as the slope of a line
Yes he is receiving a perfect score now
85 +15 = 100 %
The answer to your problem is f(x)= -12 (x-4)