find the slope from the two points (9,-2) and (9,7). find the slope from the two points (-4,-6) and (5,-6)

Answer:Step-by-step explanation:a) We have been given the points (9,-2) and (9,7)Use the slope formula to solve this.m= y2-y1/x2-x1where (x1,y1)=(9,-2)and (x2,y2)=(9,7)m=7-(-2)/9-9m=7+2/0m=9/0Having a zero in the denominator means the slope is undefined. Whenever you have a vertical line your slope is undefined....b) We have been given (-4,-6) and (5,-6)  Use the slope formula to solve this.m= y2-y1/x2-x1where (x1,y1)=(-4,-6)and (x2,y2)=(5,-6)m=-6-(-6)/5-(-6)m=-6+6/5+6m=0/11If the numerator of the fraction is 0, the slope is 0. This will happen if the y value of both points is the same. The graph would be a horizontal line and would indicate that the y value stays constant for every value of x....