Answer:
perfect positive association
Answer:
I just summited it, it was "Her mean grade would go up".
Step-by-step explanation:
Let b>a,
a+b=40 so we can say a=40-b
We are told that b-a=6.5, using a found above in the equation gives us:
b-(40-b)=6.5
b-40+b=6.5
2b-40=6.5
2b=46.5
b=23.25, and since a=40-b
a=40-23.25
a=16.75
So a=16.75 and b=23.25
check...
16.75+23.25=40, 40=40
23.25-16.75=6.5, 6.5=6.5
Given the equation:
(1)

We need to find a, b and c. So, we know that a quadratic equation is given by:
(2)

Then, we need to order the equation (1) and to adjust it to the equation (2), so:

So, if we compare these two equations, the conclusion is:



(3)

Substituiting a, b and c into (3):

Finally, the results are two values:
