Answer:
- output for 5: 3.5
- a function? Yes
Explanation:
You want a predicted value of the relation when the input is 5, and a determination of whether it is a function.
Prediction
Plotting the points on a graph, we see they lie on a straight line. The point on that line for x=5 is (5, 3.5).
The output for an input of 5 is 3.5.
Function
No input value is repeated, so the relation is a function. (There is no predicted value that will change this.)
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Additional comment
The linear relation that describes this table is ...
y = (1/2)x +1
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