Is  the expression a function? Explain by Ralph Cox https://padlet.com/y3sr7vjdem/m7dcmp5okfbolze4 Explain en-us 2023-02-07 13:43:08 UTC 2025-11-14 23:18:50 UTC hello@padlet.com https://padlet-uploads.storage.googleapis.com/732071639/647f71b2eb48462ee76712ac5107b7c6/function.png y3sr7vjdem https://padlet.com/y3sr7vjdem/m7dcmp5okfbolze4/wish/2471772270 2023-02-07 13:47:19 UTC https://padlet.com/y3sr7vjdem/m7dcmp5okfbolze4/wish/2471772270 https://padlet.com/y3sr7vjdem/m7dcmp5okfbolze4/wish/2472331095 Not a function, an x coordinate has two y coordinates, doesn’t pass the vertical line test]]> 2023-02-07 19:09:06 UTC https://padlet.com/y3sr7vjdem/m7dcmp5okfbolze4/wish/2472331095 https://padlet.com/y3sr7vjdem/m7dcmp5okfbolze4/wish/2472332204 No, because it can have 2 points if a line goes through it.]]> 2023-02-07 19:09:45 UTC https://padlet.com/y3sr7vjdem/m7dcmp5okfbolze4/wish/2472332204 No, as it does not pass the virtual line test https://padlet.com/y3sr7vjdem/m7dcmp5okfbolze4/wish/2472332558 2023-02-07 19:09:56 UTC https://padlet.com/y3sr7vjdem/m7dcmp5okfbolze4/wish/2472332558