Answer:
It's not a function.
Step-by-step explanation:
Answer:

Step-by-step explanation:
Let's subtract:



Answer:
4) y = 2x - 7
Step-by-step explanation:
First we have to find the slope by using the following formula....
let (3, - 1) be
, let (8, 9) be
, and m be the slope, then....

Now that we know the slope we can find the equation of the function by using point-slope for of the function which look like this.....

Answer:
180 degree
Step-by-step explanation:
A straight line is 180 degrees, or a "straight" angle.
The degree is 0. I don't know how to solve it I just used a website that allows you to answer things like this. <span />