7. Equations of Lines in the Coordinate Plane
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Plot the point on the coordinate plane and draw the horizontal and vertical lines passing through the point.
Horizontal Line: y=-2
Vertical Line: x=3
We will write the equation of the horizontal and vertical lines that pass through the point ( 3, -2). Let's begin by plotting the point on a coordinate plane.
Now, we can use the grid lines of the coordinate plane to create the horizontal and vertical lines.
Notice that every point on the horizontal line has a y-coordinate of -2. Likewise, every point on the vertical line has an x-coordinate of 3. We can use these facts to write the equations of the lines. Horizontal Line:& y= -2 Vertical Line:& x= 3