The vertices of a triangle are A (-2,-5), B(-2,6) and C (9,-5). The vertices of triangle A'B'C' obtained by dilating triangleABC from the origin are A'(-8, -20), B'(-8, 24) and C' (36, -20).
What is the scale factor?

14 estimated and 13.62 exacti’m pretty sure..

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.

Line ab is y = -7/5x + 56/5i don't understand  where point d comes into this.