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These are the intercepts of the graph of the equation!!
EXAMPLE 8 Using a Graphing Utility to Find Intercepts
Use a graphing utility to find the intercepts of the equation y = x
SOLUTION
3
Graph Y
= x
- 8 using Xmin = -5, Xmax = 5, Xscl = 1, Ymin = -20, Ymax = 10,
1
Yscl = 5.
The VALUE feature on a TI-83 evaluates an equation for any value of x and locates the
corresponding ordered pair on the graph of the equation. Letting x = 0 allows us to find
the y-intercept of the graph of an equation.
After graphing the equation, press 2
You should obtain the following on your screen:
nd
TRACE (this activates the CALC menu)
3
- 8.
CALC
menu
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