How is evaluating algebraic expressions different than evaluating expressions without variables?

Thee blue triangle has rotated from quadrant i to quadrant iii about the origin. describe the effects of the rotation on the coordinates of the blue triangle.

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)

Binh says the point of intersections is (0,-3) which statements identify the errors binh made , check all that apply