TRIGONOMETRIC FUNCTIONS Graphing And Analysis (Page 12 of 13)

Now press GRAPH key. to see the graph of the function with our custom window. Observe that one period fits "snugly" which confirms that our earlier analysis is correct.

 GRAPH key. Calculator screen image.

To find the y-intercept,  use the CALC value command. Enter a value for x of 0. As shown at the bottom of the screen, the y-intercept is -2.5.

 2nd CALC key. 1: menu selection. 0 ENTER key. Calculator screen image.
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