When a function is reflected, it must be reflected over a line
The new function is: 
The equation is given as:

The rule of reflection over the y-axis is:

So, we have:

Rewrite as:

Hence, the new function is:

Read more about reflections at:
brainly.com/question/938117
She originally had $400 in her bank account.
The 50w represents the amount she will put away each week.
Just subsitute 8 for n
1/2(8)^2-1/2(8)
1/2(64)-4
32-4
28
D