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Leokris [45]
2 years ago
15

How do you write an equation from a line of best fit on a graph?

Mathematics
1 answer:
marshall27 [118]2 years ago
8 0

Answer:

find y intercept and slope

Step-by-step explanation:

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What is the equation of a line passing through the points (2,1) and (-4,-1)?
bekas [8.4K]
The answer is y=1/3x+1/3
4 0
3 years ago
What is the fuction for the graph?
Andrews [41]

The <em>piecewise defined</em> function is formed by the following three functions: y = 40, for 0 ≤ x < 15, y = 0.0425 · x² - 3.8 · x + 87.438, for 15 ≤ x < 65 and y = 0.4 · x - 6, for x ≥ 65.

<h3>What is the piecewise defined function behind the graph?</h3>

In this problem we have a <em>piecewise defined</em> function formed by three functions: (i) <em>Linear</em> equation, (ii) <em>Quadratic</em> equation, (iii) <em>Linear</em> equation. The <em>first</em> function is y = 40, for 0 ≤ x < 15.

The <em>second</em> function can be found based on the knowledge of three points:

y = a · x² + b · x + c

(x₁, y₁) = (15, 40)

40 = 225 · a + 15 · b + c

(x₂, y₂) = (45, 2.5)

2.5 = 2025 · a + 45 · b + c

(x₃, y₃) = (65, 20)

20 = 4225 · a + 65 · b + c

And the <em>quadratic</em> equation is y = 0.0425 · x² - 3.8 · x + 87.438, for 15 ≤ x < 65.

And the <em>latter linear</em> equation is:

y = m · x + b

m = (30 - 20)/(90 - 65)

m = 0.4

And the x-intercept is:

b = y - m · x

b = 20 - 0.4 · 65

b = - 6

The <em>linear</em> equation is y = 0.4 · x - 6, for x ≥ 65.

The <em>piecewise defined</em> function is formed by the following three functions: y = 40, for 0 ≤ x < 15, y = 0.0425 · x² - 3.8 · x + 87.438, for 15 ≤ x < 65 and y = 0.4 · x - 6, for x ≥ 65.

To learn more on piecewise defined functions: brainly.com/question/12561612

#SPJ1

7 0
1 year ago
Which function is negative for the interval [-1, 1]?
Finger [1]

Answer:

Graph number 2

Step-by-step explanation:

See attached image.

8 0
1 year ago
Ellie borrowed some money from her friend in order to help buy a new video game
sergey [27]

Answer:   L=90-10t

0-90

1-80

2-70

3-60

Step-by-step explanation:

that should be right lol

because it decreases by ten a week so just count down by ten each week. Then, you can make the equation 90-10t and if you substitute each week for t it is true.

90-10(0)=90-0=90

90-10(1)=90-10=80

and so on...

4 0
3 years ago
You have a rectangular piece of fabric with side lengths of 7 inches and 4 inches. What is the area of the biggest possible squa
Pavel [41]

Answer:

If you were to cut it in half (3.5 x 2)

The answer would be 7

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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