No matter what, I can't seem to put a dent into this problem.

No matter what, I can't seem to put a dent into this problem.
Can't put a dent into it? Let me see the hammer you're using ;)

The place to start is with definitions.

Do you know what domain and range are? Do you know what an increasing or decreasing function is? Please state what you have learned (or, if you've learned nothing yet, look it up in your textbook or elsewhere).

If you have no other source, try this, and this.
 
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