For every function you need evaluate the function for every value in the domain D. And the collection of this values correspond to the range of the function.
1. 
2. 
3. 
4. 
Answer: B. One solution
Step-by-step explanation: As you see, both of these lines intersect on the point (0, 3). The point where the lines intersect is the solution. Since these lines are perpendicular, they will only intersect one time. Therefore, there is only one solution, that being (0, 3).
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1/4 (a) = (2/3)
a = (2/3) * (4)
a=8/3
a= 2 2/3
