Question

what does this transformation say to do? (x, y)----->(x, y + 4)

Explanation:

Step1: Analyze the transformation rule

The x - coordinate remains the same ($x$ in the pre - image is the same as $x$ in the image), and the y - coordinate of the image is obtained by adding 4 to the y - coordinate of the pre - image.

Step2: Determine the geometric transformation

In a coordinate plane, when only the y - coordinate of a point changes by a positive value while the x - coordinate remains the same, it represents a vertical shift upwards.

Answer:

The transformation says to shift each point 4 units up.