Estimate the coordinates of the points given in graph.
Given information:
The given graph is:
Formula used:
- In a graph both the axes are marked with bars with equal length.
- The y coordinate of point on x -axis is 0.
- The x coordinate of point on y -axis is 0.
- The right side of x axis from the center is of positive points, and left is of negative.
- The above side of y axis from the center is of positive points, and downward side is of negative.
Calculation:
To estimate the coordinates of points, A, B, C and D note that both the axes( x and y ) in graph are divided equally with bars.
Since the second bar in x axis is marked 2, i.e. first should be 1 and second is 2, third is 3, and so on, similarly for y axis second is marked 2, i.e. first should be 1 and second is 2, third is 3, and so on.
Since, point A is on x -axis, i.e. the y coordinate of point A is 0 and it is on first bar to the right(i.e. positive), i.e. it’s x coordinate is 1. Thus, the coordinate of point A is (1, 0).
Similarly, for point B note that:
This point is along 2 bar to the right hand side from center on x- axis and 4 bars to the upper side from the center on y- axis, and since each bar is of 1 unit i.e. it’s coordinate is (2, 4).
Similarly, for point C note that
Note that it is corresponding to the 3 bars to the left side of the x -axis from the center and 2 bars down from the center on y- axis, i.e. it’s coordinates are in negative and are:
Now D is on y -axis thus it’s x coordinate of point on y -axis is 0, and it is 2 bars down from the center on y- axis, i.e. y-coordinate is negative.
Thus, coordinate of D is:
Thus, coordinates of given points are:
Chapter P Solutions
Precalculus: Graphical, Numerical, Algebraic Common Core 10th Edition
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