Select the function that is nonlinear. a
y = 3x - 4

b
y = 2x3 - 10

c
y = 4x -12

d
y = x + 101

B

Step-by-step explanation:

A C and D are all linear. The powers on x in all three questions is 1. For example the first answer could be written as y = 3x^1 - 4. C and D are much the same.

So if you are thinking that B must be the answer, you would be right. x is raised to the third power --  or I think that is what is intended. y = x^3 - 10

your answer would be 10x - 1

m∠a is 90°

m∠b is 40°