Help me I really dk the answer to this cuz I anit as smart as yall peeps!

What is the y intercept of f(x)=(1/2)^x?

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.

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?