Understanding linear functions

Is the function linear or nonlinear?
y =  2

• Linear
• Nonlinear

Is the given function linear?

 $y=x^2+3x+10$  

• yes

• no

Why is this function nonlinear?

• This function is nonlinear because it has a constant rate of change.
• This function is nonlinear because it does not have a constant rate of change.
• The function is nonlinear because the y-intecept is (0,1)
• This function is nonlinear because there is a coefficient of 4.

Which function is NOT linear?

• $y=4x-3$

• $5x+7y=35$

• $6x+7xy-11y=8$

• $y=-11x+2$

 $4\left(x+4\right)$  

• Linear

• Nonlinear

LINEAR or NONLINEAR?

• linear

• nonlinear

Which of the following functions is a linear function?

• Identity

• Absolute Value

• Reciprocal

• Cube Root

y=x²

• Proportional

• Nonproportional

Does this graph represent a linear or nonlinear relationship?

• Linear

• Nonlinear

The frequency y (in terahertz) of a light wave is a function of its wavelength x (in nanometers). Is the function relating the wavelength of light to its frequency linear or nonlinear?

• linear

• Nonlinear