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Finding slope of horizontal and vertical lines of the first question

Finding Slope Of Horizontal And Vertical Lines Of The First Question class=

Sagot :

We are given the following two points

[tex](-4,9)\; and\; (4,9)[/tex]

Notice that the y-coordinates are the same meaning that it is a horizontal line.

Let us find the slope of the line passing through these points

[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]

Substitute the given points into the above formula

[tex]m=\frac{y_2-y_1}{x_2-x_1}=\frac{9-9}{4-(-4)}=\frac{0}{4+4}=0[/tex]

As you can see, the slope of a horizontal line is always 0.

Now, consider the following two points

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