Are these questions right

I just got back to my algebra class after a week of being absent and my teacher gave me a quiz to do so I had to teach myself.
Are these questions right?
FORMULA - y = mx + b.

1. (-1, 2) m = 2.
My answer was y = 2x + 4.

2. (3, 0) m = 5.
My answer was y = 5x + (-15).

3. (-3, -2) m = 2.
My answer was y = 2x + 4.

4. (1, -1) ; (3, 5) < < I had to find the slope for this problem & #5 by doing y2 - y1 over x2 - x1 first.
My answer was y = 3x + (-4)

5. (-2, 4) ; (0, 6)
My answer was y = 1x + 6.

Are they right? Did I make a mistake? Not simplify? Please tell me since, again, I taught myself over the course of 20 minutes.

Well done! You did all of them correctly and all 5 answers are right.

One way to do these when given a point and the slope is by using point-slope form:

(y - y1) = m(x - x1)

So for #1:
(y - 2) = 2(x - -1) = 2(x + 1)
y - 2 = 2x + 2
y = 2x + 4

When given 2 points, you can do the same thing after calculating slope (as you did).

Best of luck!