1. Identify the following functions as linear or nonlinear:

Question

xy = -9

y = 3x

x + 7 = y

y = x - 4

y = x^2

x + y - 20 = 2x

1/2x = y

y = 5/x

y = 30 - x^2

thank you

Answer 1

Ms. Sue can you help

Answer 2

What part of "I don't know" don't you understand?

Answer 3

L --- linear
N --- non-linear

xy = -9 --- N

y = 3x --- L

x + 7 = y --- L

y = x - 4 --- L

y = x^2 --- N

x + y - 20 = 2x --- L

1/2x = y ---- L

y = 5/x ---- N

y = 30 - x^2 ---- N

Did you notice why some are L and some are N ?