Answer:
Option D
Step-by-step explanation:
Given

Required
Determine if the function is quadratic

Start by representing the function as an x-y table
x:- 5 || 7 || 9 || 11
y:- 7 || 11 || 14 || 18
Next; Calculate the difference between the values of y



<em>The resulting difference are: 4 || 3 || 4</em>
Next; Calculate the difference between the difference of values of y


<em>The resulting difference are: -1 || 1</em>
<em>For the function to be quadratic, the above difference must be the same and since they are not, then the function does not represent a quadratic function.</em>
<em>Option D answers the question</em>
<span>On the day of a child's birth, a sum of money is to be invested into a certificate of deposit (CD) that draws 6.2% annual interest compounded continuously. The plan is for the value of the CD to be at least $20,000 on the child's 18th birthday.
</span>
<span>
</span>
The substitution<span> method is used to eliminate one of the variables by replacement when solving a system of equations
</span>

<span>
</span>