Answer:
QUESTION 1- 
QUESTION 2- 
QUESTION3- 
Step-by-step explanation:
For Question 1
From the given point(-3,4), we can deduce the following.
The point is in the 2nd quadrant.
The right-angled triangle which is formed has a hypotenuse of length 5 by Pythagoras theorem whrere B=3 and P=4.
The third quadrant are from 90° to 180° in which the angle lie.
so 
For Question 2
From the given point(-4,-5), we can deduce the following.
The point is in the 3rd quadrant.
The right-angled triangle which is formed has a hypotenuse of length
by Pythagoras theorem whrere B=-4 and P=-5.
The third quadrant are from 180° to 270° in which the angle lie.
so 
For Question 3
The line with equation 4b + a = 0 , we can deduce that the value of 
slope of line 
Hypotenuse of length
by Pythagoras theorem whrere B=4and P=1.
so
.