Answer: Choice C. 
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Explanation:
The domain is the set of all allowed x inputs.
Here we see that x = -3 is the smallest x value possible as it is from the left-most point. The graph goes on forever to the right, so there is no largest x value. Effectively infinity is the largest x value even though infinity is not a number.
We can say the domain is
which can be simplified to
or 
In short: x can be -3 or larger.
To get the reciprocal, simply flip the numerator and denominator. The reciprocal of 3/10 is 10/3.
The answer to the question is 2:3
Answer:
I, personally, would assume A, or 80°
Step-by-step explanation: