Question

you start at (4, 2). you move down 3 units. where do you end?

Explanation:

Step1: Recall coordinate - movement rule

In a coordinate system, moving down changes the y - coordinate. The x - coordinate remains the same when moving vertically.
The starting point is $(4,2)$. Moving down 3 units means subtracting 3 from the y - coordinate.

Step2: Calculate the new y - coordinate

The original y - coordinate is 2. After moving down 3 units, the new y - coordinate is $2 - 3=-1$. The x - coordinate stays 4.

Answer:

$(4, - 1)$