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<span> For this case, the first thing we must do is define variables.
We have then:
x: number of devices.
Y: plan charge
For the current plan we have:
</span>
<span> For the new plan we have:
</span>
<span> Since we want the new plan to be smaller than the current plan, then we have:
</span>
<span> From here, we clear the value of x:
</span>
<span> Answer:
x <18
Note: The graph is correct</span>
We have then:
x: number of devices.
Y: plan charge
For the current plan we have:
</span>
<span> For the new plan we have:
</span>
<span> Since we want the new plan to be smaller than the current plan, then we have:
</span>
<span> From here, we clear the value of x:
</span>
<span> Answer:
x <18
Note: The graph is correct</span>