What kind of postulate or theorem even is this!?

Use the graph of the sine function y=2sinθ shown below

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)