Are these functions linear or nonlinear?

1. y − 4 = −8(x – 1)
2. y = x^4
3. y – x^2 = 4.5
4. 3x + 5y = 15

Question

Are these functions linear or nonlinear?

1. y − 4 = −8(x – 1)
 2. y = x^4
 3. y – x^2 = 4.5
 4. 3x + 5y = 15

sammixboo · Answer

Anything with exponents are not linear

sammixboo · Answer

It would be exponential

sammixboo · Answer

A curved line

sammixboo · Answer

Linear is a straight line

anonymous · Answer

Okay. Thanks. But I know the difference between linear and nonlinear I just need help graphing.

sammixboo · Answer

The only one I can help with there is #4, putting it into slope-intercept form. 

To do the rest you gotta use a graphing calculator or something

sammixboo · Answer

And #1, sorry forgot to say that

anonymous · Answer

I can put them into slope-intercept form too I just need help graphing.

sammixboo · Answer

Use desmos.com that can graph equations for you :)

sammixboo · Answer

I am not sure how I can help much

sammixboo · Answer

With graphing

anonymous · Answer

Thank you. So just to be sure 2 and 3 are nonlinear

amorfide · Answer

@sammixboo  an exponent of 1 is linear, how can you say it is not linear

sammixboo · Answer

Thats something I forgot to mention. Anything to the power of one is still the same number so

sammixboo · Answer

too***

sammixboo · Answer

4^1 = 4
5^1 = 5

So it would stay the same

amorfide · Answer

I was just referring to your statement saying anything with an exponent is non linear, but 1 is an exponent