Lei withdrew $50 from her bank account everyday for a week what was the change in her account in that week

Mathematics

1 answer:

LenaWriter [7]3 years ago

7 0

$50 x 7 = $350

Answer: Her account is reduced by $350 in that week.

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Write the equation of a line that<br> goes through the point (-2, 3)<br> with a slope of 2.

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Answer:

y = 2x + 7

Step-by-step explanation:

y = mx + b The point (-2,3) gives us an x value and a y value that we can use. We are also give the slope (m). All we need to do is figure out the b (y-intercept) value.

y = mx + b

3 = 2(-2) + b

3 = -4 + b Add for to both sides

7 = b We know have every thing that we need to write the equation. We have the slope (m) which is 2 and the b (y-intercept) that we just figured out is 7

y = 2x + 7

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There were 9 passengers on the bus because no passengers got off during the six stops and the fifth stop is within that.

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A. Find a power function that models the data below.

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Using Visual inspection, the model which fits the data in the distribution better is the power function.

The power and linear functions can of the data can both be modeled using technology,

<u>Using Technology</u> :

The power function in the form $y = Ax^{B}$ which models the data is $1.926x^{1.662}$

The linear function in the form $y = Bx + A$ which models the data is $y = 7.429x - 8.333$

Where A = intercept and B = slope

From the model, correlation coefficient given by the power and linear models are 0.999 and 0.986 respectively.

Hence, the power model is a better fit for the data than the linear model.

Therefore, Inspecting the models visually, the power function fits the data better as the points on the curve are closer to the regression line than on the linear model.

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