Graphing Proportional Relationships

T.i.P.S.

Students should understand that graphing a proportional relationship will always have a y-intercept through the origin (0, 0). The unit rate will become the slope of the graph as the unit rate is the same as the slope of the line.

Example

Sandra can decorate 6 cakes in 2 hours. Create a graph that represents this relationship and determine the slope of the line. Justify your thinking. 

  Hint
Possible Solution

TEKS

Readiness Standard 8.4 Proportionality. The student applies mathematical process standards to explain proportional and non-proportional relationships involving slope. The student is expected to:
(B) graph proportional relationships, interpreting the unit rate as the slope of the line that models the relationship

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