MATH 19500 Chapter Notes -Order Of Operations, Precalculus
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A linear equation is a straight line, either negative or positive, depending on the slope. Systems of equations are multiple functions within a graph that may or may not intersect each other. ^ notice that the slope is the same, which is 3, which means we can change the y-intercepts accordingly, and we should have a parallel line. Unlike parallel lines, perpendiculars create a point of intersection, creating a 90-degree angle. Negative reciprocal of each other; they will meet a common point called the intersection point, or the solution. The solution to a system of equations is the common point or the intersecting point of the two functions. You notice that the y is already by itself. Therefore you set these two functions to equal each other. Like so: x+3=x+9, and then solve for x. Notice that when you graph this function, it"ll create a pair of parallel lines that will never touch.
