Answer:

So then the correct answer is B. $200.
Step-by-step explanation:
Notation
Let X be the average contribution size before John makes his contribution.
Let Y be the total contribution size before John makes his contribution.
Let Z be John's contribution.
We know that for this case $ 75 represent the original average amount before the contribution with 50% increase so we can set up the following equation in order to find the original average amount

And solvong for X we got:

Now we can find the total contribution before the donation with the following proportion:


And then with the formula of average taking in count the 6 values we can find the size of donation Z like this:



So then the correct answer is B. $200.
Answer:
B. Linear increasing
Step-by-step explanation:
decay means decreasing
exponential graph would have a curve
11428571429/10000000000 because all you have to do is say the number as a decimal and count the place values
X=8 she needs 120, she has 45. She needs 75 more. $10 an hour x 8 = $80