We now interpret the inequality  in terms of the function we have graphed. The solution
set will be all values of x for which the function Y1 has negative y-values.
Let's use TRACE to identify where these values of x are.
Since the x-intercept has a y-value equal to 0, it is NOT part of
the solution set. The x-values to the left of 27 yield negative y-values.
The inequality |
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The inequality is not defined for values of x less than 2.5. So, the
solution set for the inequality is 
, or in
interval notation, [2.5, 27).
