The first on is this answer here
Notice how points T and Z are vertically aligned, or vertically lined up. This is where the graph fails the vertical line test.
The input x = 2 leads to the outputs y = 3 and y = 5 (which are the y coordinates of points Z and T in that order).
A function is only possible when any given input leads to <u>exactly one</u> output only. It would be like saying "the conversion function from Celsius to Fahrenheit has 0 degrees C convert to both 32 degrees F and 50 degrees F at the same time". But such a statement makes no sense and it's not useful. So this is one example of why having one output makes sense for a function.
In short, we need one output for any given input. But the input x = 2 leads to more than one output. That's why we don't have a function.
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as a mixed number would be

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Answer:9-16=-7
Step-by-step explanation:
Answer:
12x+5
Step-by-step explanation:
If each ride is x dollars, and you want 12 tickets, 12 times x is 12x. Then you add the original upfront cost of $5.