Question

in a coordinate plane, if the y-coordinate of a point is positive, then the point is in the first quadrant.

Answer 1

This is false.

Explanation:

If the y coordinate of a point is positive, it may be in either the first or second quadrant. The point (-2, 10) has a positive y coordinate of 10 but is in the second quadrant because the x value is negative. If the x value is negative, it will be in the second quadrant, if it is positive it will be in the first.