For making a scatter plot of the data set, which would be the best scale and interval for the axis that represents the amount of fluoride? Water (L) 0.5 08 2 1.5 0.5 25
Fluoride (mg) 0.4 0.4 0.6 1.6 0.8 0.2 1.8

0 to 5 with intervals of 0.1
1 to 2.5 with intervals of 0.5
0 to 2 with intervals of 0.2
1 to 3 with intervals of 1

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

the area of the rectangle is 35units^2.

step-by-step explanation:

graph it and find the distance.

it is a 5*7 rectangle.

therefore the area is 35units^2.

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step-by-step explanation:

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this would be 35. 35 + 5 = 40. you take the known constant and subtract by the answer of the equation and you get y.