Im BORED lets talk about anime :D *second time i do this yes i'm that desperate

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Which statement justifies why angle ebc measures 90?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?