Friday, May 20, 2011

Linear Function

A linear function is given as f(x) = mx + c where m is the slope of the graph and c is the y-intercept.

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Slide the values of m and c to observe the changes of graph f(x) = mx + c. You may realize that for

m > 0, the graph is increasing;
m = 0, the graph is constant;
m < 0, the graph is decreasing;

while for

c > 0, the graph has positive y-intercept;
c = 0, the graph passes through the origin;
c < 0, the graph has negative y-intercept.

Betty, Created with GeoGebra

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