Consider the given figure. We are told that point D is at (-4, 1), so let's include that in the graph.
We want to use the sides of â–³ BDA to find the slope of the line. To do so, remember that the slope is the value of the ratio of the change in y to the change in x between any two points on the line.
m=Change iny/Change inx
In our case, we will consider the change in x as the length of DA and the change in y as the length of BD. From the graph we can see that the length of DA is equal to 2 and the length of BD is equal to 1.
m=1/2
Since the line falls from the left to the right, the slope is negative. Therefore, the slope of the line is equal to - 12.
Extra
Linear Equations
A linear equation is an equation whose graph is a line.
This type of equation contains at least one linear term and any number of constants. Let's see a few examples!
& y=2x+1,
& 3x=6 +3,
& 2y+x=4
For those of you who are interested in learning more about the different types of linear equations and their graphs, you can read more about them on the following pages.
