write a linear equation that pass through two points (2, -5) and (4,3), you may use any instrument/device to do so but must show all the working...

1. write a linear equation that pass through two points (2, -5) and (4,3), you may use any instrument/device to do so but must show all the working process, not just the final solution/answer.

2. Convert the function y = f(x) = -3x2 - 12x -7 to vertex form (must show work) and ROUGHLY graph it by starting with y = x2.