Is It Linear or Nonlinear

Is the following equation linear or nonlinear? 

• Linear 

• Nonlinear 

Is the function linear or nonlinear?

y = -4x

• Linear

• Nonlinear

Is the function linear or nonlinear?
y = 3x² - 4x + 2

• Linear

• Nonlinear

Is the function linear or nonlinear?

y = 6x + 4

• Linear

• Nonlinear

This function is (a)  

• Linear

• Nonlinear

Function A: is ​ (a)   And Function B : is ​ (b)  

• Nonlinear

• Linear

Is the function Linear or Nonlinear?

• Linear

• Nonlinear

Is this function linear or nonlinear?

• linear

• nonlinear

This function is (a)  

• Linear

• Nonlinear

Is this function linear or nonlinear?

• Linear function

• Nonlinear function