F(x) = 40 - 1.25x is a function.
Answer:

Step-by-step explanation:
First, let's start with what we have. If we use
here's what we can put in:

Then we can use one of the given points to find the y-intercept. Since the only complete one is (12,10), we'll use that.

So now we have
.
Now we can use our other point with the missing y-value and solve for y.

So the missing value is 64.
Hope this helps!
Answer:
I think b because it goes from most to least sorry if u can't understand
Answer:
Y=3x+3
The y intercept is 3 and use rise over run to find m.
It may be easier to start from
.. a(x +3)(x -1) = 0
.. a(x^2 +2x -3) = 0
The quadratic
.. ax^2 +bx +c = 0 will have solutions -3 and 1 for ...
.. a ≠ 0
.. b = 2a
.. c = -3a