Jon places a dot on a coordinate plane at (-10, -4). he wants to place another dot across the y axis, and it must be 14 points away. where will jon place the other dot?

At (4,-4). Because, the first value is the horizontal x-coordinate and the second is the vertical y-coordinate, so the direction of going across the y-axis is a horizontal movement. Therefore, you must add 14 to the x-coordinate. You add because positive is the opposite direction of the your first x-coordinate, -10. So the answer is (4,-4).