The table shows a function. Is the function linear or nonlinear?
x y
7 20
8 12
9 7

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Which of the following points is collinear with (-2,1) and (0,3)