Question:
Solution:
By definition, the slope of a line is given by the following formula:
EQUATION 1:
[tex]m\text{ = }\frac{Y2-Y1}{X2-X2}[/tex]
where (X1,Y1) and (X2,Y2) are points on the line. In this case, we have that:
(X1,Y1) = (5,9)
(X2,Y2) = (3,9)
thus, replacing these points on equation 1, we get:
[tex]m\text{ = }\frac{Y2-Y1}{X2-X2}=\text{ }\frac{9-9}{3-5}\text{ = }\frac{0}{-2}=\text{ 0}[/tex]
then, we can conclude that the correct answer is:
m = 0
