Y=mxc where m is the gradient of the graph and c is the yintercept of the graph The gradient between any two points (x 1, y 1) and (x 2, y 2) are any two points on the linear or straight lineIf we graph the points determined by these ordered pairs and pass a straight line through them, we obtain the graph of all solutions of y = x 2, as shown in Figure 73 That is, every solution of y = x 2 lies on the line, and every point on the line is a solution of y = x 2A line graph is set up as a vertical axis (the Y axis) and a horizontal axis (the X axis), forming a grid One of the two factors is measured on the Y axis and the other is measured on the X axis To create the graph a point is placed on the grid where the value of the X variable and the value of theY variable intersect

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