What would be the point for B' after a dilation using a scale factor of 2.5?

Coordinates of B' → (7.5, 35.5)

Step-by-step explanation:

Rule for the dilation of a point with a scale factor 'k' about the origin,

(x, y) → (kx, ky)

By this rule coordinates of the image point B' when scaled by a scale factor of 2.5,

B(3, 15) → B'(2.5 × 3, 2.5 × 15)

            → B'(7.5, 37.5)

Therefore, coordinates of point B' → (7.5, 35.5)

okay wait before i answer, is this for your points on a graph?