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Artyom0805 [142]
3 years ago
7

Write an equation for your trend line?

Mathematics
1 answer:
Soloha48 [4]3 years ago
4 0
Find two points on the graph that the line crosses through almost perfectly. It looks like (1,10) and (9,1) will do.

Use them to compute the slope:
m = (1 - 10) / (9 - 1)
= -9/8

Then set up the "point-slope form":
y - y0 = m * (x - x0)

You choose some point (x0, y0) that the line crosses through. We already know the line passes through (1,10) pretty well, so let's use that.

x0 = 1
y0 = 10

Now finish plugging into the equation:
y - 10 = -9/8 * (x - 1)

The above equation will work fine for an answer, but let's go a step further and solve for y.

y - 10 = -9/8x + 9/8
y = -9/8x + 9/8 + 10
y = -9/8x + 9/8 + 80/8
y = -9/8x + (9 + 80)/8
y = -9/8x + 89/8
You might be interested in
What is the five number summary for this data set?
MrRa [10]

Answer:

see explanation

Step-by-step explanation:

The median is the middle value of the data set in ascending order. If there is no exact middle then the median is the average of the values either side of the middle.

Given

3   8   14   19   22   29   33   37   43   49

                            ↑ middle is between 22 and 29

median = \frac{22+29}{2} = \frac{51}{2} = 25.5

The upper quartile Q_{3} is the middle value of the data to the right of the median.

29   33   37   43   49

               ↑

Q_{3} = 37

The lower quartile Q_{1} is the middle value of the data to the left of the median.

3   8   14   19   22

           ↑

Q_{1} = 14

The min is the smallest value in the data set, that is 3

The max is the largest value in the data set, that is 49

The 5 number summary is

3,  14,  25.5,  37,  49

8 0
2 years ago
Calculate the area of the circle with radius of 4.5 leave Answer in terms of pi
aleksklad [387]
A=pi r^2
= 20.25 pi is the answer
8 0
3 years ago
Solve by completing the square ( need it asap pls) <br><br> x2+18x+81=-4<br><br> -don’t send link-
Sholpan [36]

Answer:

x=2.17

Step-by-step explanation:

x^2 +18x+81=-4

            -81  -81

x^2 +18x= -85

    /18       /18

x^2= -4.7

\sqrt{x^2}= \sqrt{-4.7}

x= 2.17

I hope this helps :) (if it does, brainliest, please??)

6 0
3 years ago
Which one of the following reasons does NOT explain why 4x+5y≠9xy?
viva [34]
<h3>The terms 4x and 5y has different variable present in it. 4x + 5y \neq 9xy</h3>

<em><u>Solution:</u></em>

Given that,

4x + 5y \neq 9xy

<em><u>The reason is:</u></em>

When we are adding terms which has exactly the same variables, we must add the constants and let the result stand with variable

Which means,

4x + 10x = 14x

But,

We cannot add terms that has different variable

Which means,

4x + 5y

Here, both the terms 4x and 5y has different variable present in it. Hence they cannot be added together

4x+5y\neq 9xy

6 0
2 years ago
Can you help me by showing work on some of them please I’m having trouble
Xelga [282]
1, 1.84+2= 1.84+2.00=3.84
3, 0.90+2= 0.90+2.00 = 2.90
4, 0.5+5= 0.5+5.0=5.5

Do you want more?
6 0
3 years ago
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