Answer: m=3/2
Step-by-step explanation: the slope starts from the left side and the line is going up meaning its positive, now the line is going up by 3s and to the right in 2s.
 
        
             
        
        
        
Find the slope first
slope=(2-1)/(-1+3)=1/4=.25
now use the slope and either point to write in point slope form
y-1=.25(x-2)
y-1=¼x-½
to rationalize all the denominators multiply by the last common multiple, here we get 4
4y-4=x-2
then put in the correct order
x-4y=-2
        
             
        
        
        
Irrational number 
There is a chart on goggle
        
             
        
        
        
Answer:
they give you its a right angle. right angle means its 90 degrees. to find x simply just subtract 62 from 90