Which of the following statements are true about functions and relations?

The vertical line test will not work for piece-wise defined relations.

No piece-wise relations can be functions.

The vertical line test must only cross the curve one place for each x value.

The vertical line test can cross the curve at more than one place for each x value.

Question

Which of the following statements are true about functions and relations?

 The vertical line test will not work for piece-wise defined relations.

 No piece-wise relations can be functions.

 The vertical line test must only cross the curve one place for each x value.

 The vertical line test can cross the curve at more than one place for each x value.

anonymous · Answer

@mathmale

anonymous · Answer

C right?

anonymous · Answer

@phi can you help me?

phi · Answer

yes,  The vertical line test must only cross the curve one place for each x value.

anonymous · Answer

@phi did you see all the things that kid was typing?

phi · Answer

yes, he is/was a troll.

anonymous · Answer

oh ok then that explains a lot... can you help me with one more problem?

anonymous · Answer

Which one of the following is a function?

 5x – 2y = 10

 5x – 2y^2 = 9

 5x^2 – 2y^2 = 9

anonymous · Answer

@e.mccormick

phi · Answer

any guess?   (simplest is the best guess)

anonymous · Answer

A

anonymous · Answer

5x – 2y = 10 right? @phi  that is a function

phi · Answer

yes.  that is the equation of a line.  and lines (except a vertical one) will pass the vertical line test.
the others are hyperbolas... the y^2  part cause trouble.

anonymous · Answer

thanks!!!