MATH-1125 Lecture : Section 2 1 Class Notes 0
Document Summary
Throughout chapter one, we solved several types of equations including linear equations, quadratic equations, rational equations, etc. Each of these equations had something in common. They were all examples of equations in one variable. In this chapter, we will study equations involving two variables. A solution to an equation involving two variables consists of a pair of numbers, an x-value and a y-value for which the equation is true. Each pair of values is called an ordered pair because the order does matter. We use the notation ( represent an ordered pair. Notice that the x-coordinate or abscissa is first, followed by the y-coordinate or ordinate listed second. To represent an ordered pair graphically, we use the rectangular coordinate system also called the cartesian coordinate system named after the french mathematician ren descartes. The plane used in this system is called the coordinate plane or cartesian plane.
