So since the first point (0,30) has an x intercept of 0 and a y intercept of 30 We can immediately eliminate any that do not have an y intercept of 30 So choices a and b are automatically incorrect
and now to solve for slope we do (y2-y1)/(x2-x1) so we can choose any two points so I'll use points (0,30) and (1,33)
so 33-30=3 and 1-0=1
so we then do rise(y) over run (x) and we now know our unit rate is 3x
Two angles are said to be supplementary if they add up to 180 degrees. So the supplement of an angle is obtained by subtracting it from 180. i.e., if x is an angle, its supplement is 180−x