That has a y intercept at y=-1.   For every one block to the right we go three blocks up, so that's a slope of 3/1=3.    So in slope-intercept form our equation is
y = 3 x - 1
Answer: third choice
 
        
                    
             
        
        
        
HL Theorem would prove these two triangles are congruent.
        
             
        
        
        
4 because 6(4) = 24 and 24-3=21