1. There are only 7 black buttons, 5 yellow buttons and 6 green buttons in a bag.
1 answer:
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Answer:
Known two points, list function expression, use
The function expression is
It is known that the cross section of two points is 7, so the point of 2:3 is 14 / 5, that is, 0 + 14 / 5 is the abscissa of the point, which is substituted into the original equation to get y = - 7 / 5.
So the result is