Pls help me in these two little exercises about the slope.

3)  

4) a)  

  b)  

Step-by-step explanation:

Exercise 3

Exercise 4

a) If L2 is parallel to L1, it has the same slope (gradient) ⇒

If L2 passes through point (3, 1):

So L2 = L1

b) If L3 is perpendicular to L1, then the slope of L3 is the negative reciprocals of the slope of L1  ⇒  

If L3 passes through point (-5, 2):

#Ex-3

#Ex_4(1)

Equation in point slope form

#2

we need the options

step-by-step explanation: