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Whitepunk [10]
3 years ago
15

Type the correct equation of the line. (0, 1), (2, -3), (4, -7)

Mathematics
2 answers:
Brilliant_brown [7]3 years ago
6 0
<h3>Answer: y = -2x+1</h3>

====================================

Explanation:

Use the slope formula to get the slope

m = (y2-y1)/(x2-x1)

m = (-3-1)/(2-0) .. I used the first two points

m = -4/2

m = -2

The slope is m = -2

The y intercept is b = 1 as this is the y coordinate of the point (0,1). The y intercept always happens when x = 0.

Plug the m and b value into y = mx+b to get y = -2x+1

As a check, plug x = 0 into y = -2x+1. You should get y = 1.

Repeat for x = 2 and you should get y = -3

Repeat for x = 4 and you should get y = -7

amid [387]3 years ago
4 0

Answer:

1(2-3)(4-7)

(1)(-1)(4-7)

-1(4-7)

(-1)(-3)

=3

Step-by-step explanation:

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Assume the population has a normal distribution. A sample of 25 randomly selected students Has a mean test score of 81.5 With a
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Answer:

The 90% confidence interval for the mean test score is between 77.29 and 85.71.

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We have the standard deviation for the sample, so we use the t-distribution to solve this question.

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The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.064\frac{10.2}{\sqrt{25}} = 4.21

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The upper end of the interval is the sample mean added to M. So it is 81.5 + 4.21 = 85.71.

The 90% confidence interval for the mean test score is between 77.29 and 85.71.

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Work out the size of the angle marked t
tiny-mole [99]

Answer:

<h2>35°</h2>

Step-by-step explanation:

This is an isoceles triangle

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