Graphing+Linear+Functions-Target+B-Is+it+a+Function?-Practice+Problems

Target B: Justify whether any given representation is a function.
Is it a Function? Do the following sets of data represent a function? Justify your answer. math \textbf{1)} \ {(1,4),(-2,4),(3,5),(-2,2)}\\ math

math \textbf{2)} \ {(-10,5),(12,5),(7,12),(12,-2)}\\ math

math \textbf{3)} \ {(0,0),(5,4),(4,5),(-1,0)}\\ math

Do the following tables represent a function? Justify your answer. math \textbf{4)} \begin{array}{|c|c|c|c|c|c|} \hline \textbf{x} & -1 & 4 & -1 & 7 & -5 \\ \hline \textbf{y} & 5 & 6 & 4 & 9 & 7 \\ \hline \end{array} math

math \textbf{5)} \begin{array}{|c|c|c|c|c|c|} \hline \textbf{x} & 0 & 1 & 2 & 3 & 4 \\ \hline \textbf{y} & 5 & 6 & 6 & 7 & 8 \\ \hline \end{array} math

math \textbf{6)} \begin{array}{|c|c|c|c|c|c|} \hline \textbf{x} & -2 & -1 & 0 & 1 & 2 \\ \hline \textbf{y} & 7 & 8 & 9 & 10 & -11 \\ \hline \end{array} math

Do the following graphs represent a function? Justify your answer.
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 * 15)** Create a set of ordered pairs that is not a function. Justify your answer.


 * 16)** Create a graph that is a function, explain why it is. Justify your answer.


 * 17)** Create a table that repeats the output once that is still a function. Justify your answer.


 * 18)** Given the following graph, what is a possible point that would make the graph not a function?


 * 19)** Is the following a function? Let each day of the year be an input and each student at a school an output. If each day of the year is paired with a student in the school, would this represent a function? Explain your reasoning.


 * 20)** If the input is a student's I.D and the output is their picture. Would this represent a function? Explain your reasoning.

3B: Practice Problem Solutions - All Answers