there is no horizontal-line test for functions, because people do not do the test that is why !!!
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There are quadratic functions and irrational functions and fractional functions and exponential functions and also finding maxima and minima
Of the three functions, all three pass the vertical line test. That is, if you draw a vertical line anywhere on the graph that the function is, that line will only pass through the function once. All three are also invertible functions, which means that there is a function that is capable of "undoing" the original function. And because the functions all pass the vertical line test, they are all able to be differentiated.
yes because if you use the vertical line test it will not cross it more than once.
They are all one-to-one as they all pass the vertical line test.
the domain value is the x coordinate, and the range is the y coordinate. after graphing, do the vertical-line-test to see if it is a function or not.