Question

you move up 4 units. you end at (3, -1). where did you start?

Explanation:

Step1: Analyze x - coordinate

Moving up or down does not change the x - coordinate. So the x - coordinate of the starting point is the same as that of the ending point, which is 3.

Step2: Analyze y - coordinate

Moving up 4 units means adding 4 to the y - coordinate of the starting - point to get the y - coordinate of the ending - point. Let the y - coordinate of the starting point be $y$. Then $y + 4=-1$. Solving for $y$, we get $y=-1 - 4=-5$.

Answer:

$(3, - 5)$