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5 September, 08:23

True or False? Top or bottom.

1) A straight line on a coordinate plane always represents a function.

or

2) The equation y=2x+1

+3
Answers (2)
  1. 5 September, 10:42
    0
    1) false

    It doesn't

    yfuyfyfu
  2. 5 September, 12:02
    0
    1) is not true. straight lines are not always functions, because for a line to be a function, it must pass the "vertical line" test. x = 1, for example, is a vertical line, and it does NOT pass the vertical line test, but it IS a straight line. this example shows that the first is false.

    2) doesn't look like the complete choice, but if it's asking whether or not y = 2x + 1 is a function, the answer is yes. you can know this by plugging it into a grapher and seeing that it's a line that passes the vertical line test (aka, making it a function).
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