The graphs are curved, not segments ending in a point.
http://www.wolframalpha.com/input/?i=plot+y+%3D+sin+x+for+-3.2+%3C+x+%3C+3.2+and+-1.1+%3C+y+%3C+1.2
Is not factorable over real numbers, but if you want to use imaginary numbers then it would be (x+13i) (x-13i)
Answer with rational numbers: Not Factorable
Answer with imaginary numbers: (x-13i)(x+13i)
Answer:

Step-by-step explanation:

Answer: 1/2
Step-by-step explanation: y = (1/2)x has the format y = kx, where k is the const. of prop. In this particular case that const. of prop. is (1/2).
That is not possible to make a triangle with a right angle and a acute angle because a acute triangle only has acute angles and a right triangle has a obtuse angle in it