The value of the ratio of adults to children is 2/5. The ratio of adults to children is 10:5
5:2
2:5

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

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The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?