Answer:
You graph them.
Go to desmos and put the equations in the calculator. It will graph them for you. Or you could graph them on paper, like the y-intercept is the amount you start with, like 11 or 2 in question 3. then you go two up and one to the side or 1 up and one to the side, depending on how many x there is. or how much the slope is. Like y=x+2 is where you start with (0,2) plot it and then you go one up, one to the side, and then repeat twice. Then plot the line. and in y=11-2x you plot (0,11) and then go down two, one to the side, and repeat twice. Then plot the line.
In question 4, y=3-2x, plot point (0,3) and then go two down, one to the side, and repeat twice. Plot the line. in y=1+2x, plot point (0,1) and then go two up, one to the side.
that's how you plot the slope equation.
Explanation: