Hi, I'm happy to help!
To find the slope, you need to use the slope formula, where m is the slope:
m=

Slope means rise over run, or how much the line rises per the amount the line moves forward. This equation shows the movement from the y points to show rise, over the difference in the x points to show run.
Now, to find the slope we insert our values, starting with our second y point:
m=

Now insert our first y point:
m=

Now we insert our second x point:
m=

And finally our first x point:
m=

Now, we solve:
m=

So, our slope is -2/-6, to simplify it, we remove both negatives because they cancel each other out.
m=

Now, we simplify our fraction by dividing the top and bottom by 2:
m=

So, our slope is 1/3. This means that for every 1 unit the line rises, it goes to the right 3 units. The y-intercept is where the line hits the y axis.
If the question is asking for slope intercept form for the equation, you use y=mx+b
y represents any y coordinate on your line, m represents your slope (1/3), x represents any x coordinate on your line, and b represents your y-intercept (3).
If you were to insert these values, you would get:
y=
x+3
You use this to find what a y coordinate would be so you can draw your line.
For the next equation we do the same thing:
m=

Insert our values:
m=

Get rid of the double negative:
m=

Solve:
m=

Simplify:
m=

Now that we know our slope, let's plug it in to our slope intercept form equation.
y=
x+3
I hope this was helpful! Keep learning! :D