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itssergioa
20.10.2019 •
Mathematics
True or false
1.)the graph of a function is always a straight line.
2.)the equation y=xy=x represents a function.
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Ответ:
y = x does represent a function. while it doesn't look like it, this equation is still in slope-intercept, y = mx + b, form. the slope is just 1 and the y-intercept is 0, so what's left is the equation y = x. the definition of a function requires an output for every input, and this equation still works. try plugging in 1 for x:
y = (1)
y = 1
so when your input is 1, your output is also 1. look at the graph of y = x and you'll understand why this works. furthermore, while looking at the graph, you can double check that this is a function with the vertical line test (which makes sure that x values aren't repeated).
Ответ:
2.490÷70
3.20x40÷50=16
4.49 per booth with 5 left over