Question

What is the coordinate of the point$(- 12, 7)$, what is the y-coordinate?

Short answer

The$x$-coordinate and the $y$-coordinate are $-12$and 7 respectively.

Step-by-step solution

What is a coordinate system? 

A Rectangular or Cartesian coordinate system in two dimensions (x and y) is defined by an ordered pair of perpendicular lines or axes

Points are placed by their distance along a horizontal (x) and vertical (y) axis from the origin, defined as (0, 0).

Coordinate of the Origin

It has zero distance from both the axes. Hence the coordinates of the origin are (0, 0).

Sign convention of all quadrants:

First quadrant: x – positive and y – positive

2^nd quadrant: x – negative and y – positive

3^rd quadrant: x – negative and y – negative

4^th quadrant: x – positive and y – negative

Coordinate Geometry in Two Dimensional Plane

Incoordinate geometry, first, we learn about locating the points in a X – Y coordinate plane.

For example, the point (2, 3) is 3 units away from the X−axis measured along the positive X−axis and 2 units away from Y−axis measured along the positive Y−axis.

The points having x-coordinate as ‘0′ lies on the Y−axis and the points having Y-coordinate as ‘0’ lies on the X−axis

For example, the points (2, 0), (5, 0) lies on X−axis and the points (0, −3), (0, 7) lies on Y−axis

What is the x-coordinate of the point (– 12, 7), what is the y-coordinate?

Consider, the point provided in the question, $\left(-12,7\right)$

In ordered pair the first number represents $x$-coordinate and the second number represent the $y$-coordinate.

Thus, $x$-coordinate is $-12$ and$y$-coordinate is 7.