Abscissa is: a. the first number (or x value) of an ordered pair coordinate plane b. a way of locating points in a plane that consists of a horizontal and a vertical number line intersecting at the zeros coordinates c. an ordered pair, (x, y), that describes the location of a point in the coordinate plane ordinate d. the second number (or y-value) of an ordered pair origin e. the point of intersection, (0, 0), of the axes in the coordinate plane quadrant f. region in the coordinate plane x-axis g. the horizontal axis in the coordinate plane y-axis h. the vertical axis in the coordinate plane

Answer:The first number (or x value) of an ordered pair.Step-by-step explanation:Abscissa is the first number (or x value) of an ordered pair.A coordinate plane is a way of locating points in a plane that consists of a horizontal and a vertical number line intersecting at the zeros.Coordinates are an ordered pair, (x, y), that describes the location of a point in the coordinate plane.Ordinate is the second number (or y value) of an ordered pair.Origin is the point of intersection, (0, 0), of the axes in the coordinate plane.A quadrant is a region in the coordinate plane.X axis is the horizontal axis in the coordinate plane.Y axis is the vertical axis in the coordinate plane.