An equation whose variables are polar coordinates is called a polar equation. These equation are characterized by an r as a function an angle. Polar equations can be written in rectangular coordinates by certain relationships. An example of a polar equation would be r = 2sin∅.
Answer:
f(-4) = -12
Step-by-step explanation:

To calculate f(-4), we need to substitute x in our equation above with -4:

Note that 2*(-4) = -8
Answer: f(-4) = -12
Lets say our number is 237x8
2+3+7+8+x should be divisible by 6.
20+x should be divisible by 6.
x=4
-4,0
2,0
both are true because they do not have a y coordinate, meaning they dont move off of the x-axis