Help please no wrong answer

Part a: select all of the ordered pairs that are located on the graph of the equation. part b: does the graph of the equation represent a function? select all correct answers for part a and one answer for part b.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons