A car traveling down a steep hill is the model for this resource. The confusion comes when the elevation, E, is given in terms of distance, d. The distance, d, is the horizontal distance from E. Therefore, the equation, E = 7500 – 250d, is in slope-intercept form and the slope can be read directly. Include this in your class discussion.

Concepts

functions, linear relationships, linear, slope-intercept form, linear equations

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Additional Tags

y=mx+b, linear relationship, function, math

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Pros

• Creates a good model of elevation

Cons

• Graph or table not needed for solution

Common Core

8.F.B.4