Question

Find the slope between the two given points in questions 3-4.

Answer 1

I think you have to figure out the gradient, so you take the 2 points and put it into the equation
change in y divided by change in x aka
y2-y1/x2-x1

so for question 3:
y2=4 and y1=3
(taken from the first and second coordinates)
x2=3 and y1=7
put these values jnto the equation
4-3/3-7 = 1/-4 (can be written as negative 1/4)

for question 4 its the same thing:
y2=9 and y1=5
x2=4 and x1=2
put into equation
9-5/4-2 = 4/2

hope this helps, im also hoping your teacher already has taught this because i didnt go into detail of where the equation came from, if not ask me and ill gladly help X

Answer 2

The general formula for the slope between two points is slope = . To find the vertical and horizontal distances between the two points, sometimes this can be seen by looking at the graph, but the vertical and horizontal distances between two points can always be found by subtracting the coordinates of the two points.
I've attatched a visual example for you;

if you follow this formula you will end up with the following results : 

3) 1/-4 = -0.25 = Negative Slope
4) 4/2 = 2 = Positive Slope

Hope I helped