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
        
                    
             
        
        
        
Divide total distance by total time:
5 feet / 2 seconds = 2 and 1/2 feet per second.
 
        
             
        
        
        
Answer:
The exact value of tan(45°) is 1
Step-by-step explanation:
I hope it's helpful!
 
        
             
        
        
        
28 is your answer
67-28 = 39
39-28 = 11
if this isn't correct plz leave a comment below before reporting
hope this helps