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-x1
where (x1,y1)=(9,-2)
and (x2,y2)=(9,7)
m=7-(-2)/9-9
m=7+2/0
m=9/0
Having 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-x1
where (x1,y1)=(-4,-6)
and (x2,y2)=(5,-6)
m=-6-(-6)/5-(-6)
m=-6+6/5+6
m=0/11
If 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....
