Answer:
2. x + y

-1.375 + -2.75 = -4.125
Step-by-step explanation:
1. x - y

-1.375 - -2.75 = 1.375
2. x + y

-1.375 + -2.75 = -4.125
3. x/y

1.375/-2.75 = 0.5
4. x * y

-1.375 * -2.75 = 3.78125
Yes, A fixed amount is a rate of change.
Part 1: From the closing reflection I observed that there are 6 conditional statements. One of them is incorrect. For all six of them you need to give them a try.
It looks like it is 5/3 for line E and 2/1 for line D.
(a) 64
divide 16 by .25 and you will get 64
(b) 34
multiply 40 by .85