Review of the Coordinate Plane

This lecture series reviews the basic concepts related to graphing points on the Cartesian coordinate plane and associated terminology.

Quadrants on the coordinate plane - Questions

Answers

1. F. y-axis

To graph (0, -4), we move right 0 from the origin, then down 4 from there.

Now, let's look at the quadrants and axes.

(0, -4) is located on the y-axis.


2.

Let's plot each point on the coordinate plane.

Now, let's label the axes and quadrants:

Ordered Pair Location
 (-9, -8) Quadrant III
 (1, 0) x-axis
 (7.5, 2) Quadrant I


3. B. Second quadrant, D. Fourth quadrant

Let's look at the signs of x- and y-coordinates in each quadrant.

The coordinates in quadrants II and IV have opposite signs.

Neither coordinate is 0, so point E cannot be located on an axis.

Point E could be located in Quadrant II or Quadrant IV.


4. B. Second quadrant

To graph (-2.5, 2), we move left 2.5 from the origin, then up 2 from there.

Now, let's look at the quadrants and axes.

 (-2.5, 2) is located in the second quadrant.


5.

Let's plot each point on the coordinate plane.

Now, let's label the axes and quadrants:

Ordered Pair Location
 (-3, 9) Quadrant II
 (6, -6) Quadrant IV
 (0, -1 \frac {1}{2}) y-axis


6. A. First quadrant, C. Third Quadrant

Let's look at the signs of x- and y- coordinates in each quadrant.

The coordinates in quadrants I and III have the same signs.

Neither coordinate is 0, so point P cannot be located on an axis.

Point P could be located in Quadrant I or Quadrant III.


7. E. x-axis

To graph (6, 0), we move right 6 from the origin, then up 0 from there.

Now, let's look at the quadrants and axes.

(6, 0) is located on the x-axis.