What is the distance of the point $(6, 8)$ from the $x$-axis?

The polar coordinates of the point whose Cartesian coordinates are $(-2, -2)$ are given by

Write the equations for the $x$-axis and $y$-axis.

What is the distance between the points $(a, 0)$ and $(0, a)$?

What are the coordinates of the point that divides the line segment joining the points $(-3, -4)$ and $(-8, 7)$ externally in the ratio $7 : 5$?

Let $A = (a_1, a_2)$ and $B = (b_1, b_2)$ be two points in the plane with integer coordinates. Which one of the following is not a possible value of the distance between $A$ and $B$?