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Representing Linear Non-Proportional Situations

T.i.P.S.

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Students should understand that linear situations can be represented as words, tables, graphs, and equations. Non-proportional situations will affect these representations because the y-intercept in the graph will no longer be zero, the ratios in the table will not be proportional, and the equation will be affected because the number will be added or subtracted which is represented by b.

Example

Write an equation for the graph below. 
85b

Hint
Possible Solution

Digital Tools

Click on the following links for interactive games. 

Graphing Linear Equations

Explore the Properties of a Straight Line Graph

Evaluating a Linear Function 

Resources

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TEKS

Supporting Standard 8.5 Proportionality. The student applies mathematical process standards to use proportional and non-proportional relationships to develop foundational concepts of functions. The student is expected to:

(B) represent linear non-proportional situations with tables, graphs, and equations in the form of y = mx + b, where b ≠ 0 

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