8.AT.C.8: Identify whether a function is linear or non-linear given equations, graphs, or input-output pairs, and provide a justification using reasoning about the constant rate of change and its relationship to proportional reasoning.

Identify whether a function is linear or non-linear given equations, graphs, or input-output pairs, and provide a justification using reasoning about the constant rate of change and its relationship to proportional reasoning.

Example Problems

What is the slope of

y = x + 8

?

What is the slope of

y = 9 - x

?

What is the slope of

y = 4x + 9

?

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