Find the slope of a line perpendicular to 4x-y=6

Use set buikder notation to represent the following set: {, -2, -1, 0}

Given: hf || jk; hg ? jg prove: fhg ? kjg to prove that the triangles are congruent by asa, which statement and reason could be used as part of the proof? fgh ? kgj because vertical angles are congruent. jkg ? hfg because vertical angles are congruent. fhg ? jkg because right angles are congruent. hfg ? kjg because alternate interior angles are congruent.

Math i have no idea how to do a and b