How do you do number 4 ? Can someone please explain too me ?

Answer:
Step-by-step explanation:
So, you're given a slope of - (2/3) and are to graph it?
Recall that slope, m, = rise / run
= (change in y) / (change in x)
As the simplest possible example, start your graphing at (0,0).
Place a black dot there. Now, starting at that dot, move your pencil point 3 units to the right; this is the change in x. Place a dot there. Now, starting there, move 2 units down. Place a third dot there. Draw a line through (0,0) and this third dot, which is (3, -2).
Let's try another example involving slope:
Let's graph y = 3x - 1. Comparing this to y = mx + b, we see that the slope, m, is 3 (or 3/1) and the y-intercept is (0, -1).
Place a black dot at (0, -1). Then, from this point, move 1 unit to the right and then 3 units up. Place a black dot there, at (1, 3). Draw a line through the two points (0, -1) and (1, 3).