. F.3). If the first line intersects the x-axis at the point ... then we associate the ordered pair of real numbers (a, b) with the point P. The number a is called the x-coordinate or abscissa of P and the number b is called the y-coordinate or .... As illustrated in Figure F.12, intersections of a graph with the x-axis have the form (a, 0).
(2f)) D ;
The ordered pair for point B, given that it lies on the function f ( x ) = − 3 x 2 with an x-coordinate of 2, is ( 2 , − 12 ) . To find this, we substitute 2 into the function and calculate the corresponding y-value.
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