Answer: Option C

Step-by-step explanation:
The graph shows a radical function of the form 
Where n is a positive number.
For this type of function, if the coefficient
then then when x tends to
f(x) tends to
and when x tends to
then f(x) tends to
.
Notice in the graph that as x increases then f(x) also increases and as x decreases f(x) also decreases.
This indicates that the coefficient 
So lets say u have 100$ and it decreases by 100% u would have no money left
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➷ 3.5 + x = 7
We need to isolate x
Subtract 3.5 from both sides:
x = 3.5
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