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3 years ago

I need help remembering how to solve for the equation of best fit

1 answer:

8 0

Here is a step by step process of how to do the paper and pencil solution:1. Prepare a scatter plot of the data on graph paper.2. Using a strand of spaghetti, position the spaghetti so that the plotted points are as close to the strand as possible.

3. Find two points that you think will be on the "best-fit" line.

4. We are choosing the points (9, 260) and (30, 530).
You may choose different points. 5. Calculate the slope of the line through your two points (rounded to three decimal places).6. Write the equation of the line. 7. This equation can now be used to predict information that was not plotted in the scatter plot.
Question: Predict the total calories based upon 22 grams of fat.ANS: 427.141 calories

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Seven less than twice the number

Nostrana [21]

Answer:

$2n-7$

Step-by-step explanation:

Let the number be n.

Twice the number: 2n.

Seven less than twice the number: 2n - 7.

7 0

3 years ago

Solve each problem step by step so I can understand... I forgot how to do this. ;-;

sashaice [31]

Answer:

For each of them, you would need to isolate the variable.

Step-by-step explanation:

Okay so for the first one, you would need to isolate the x.

x/-2 = 3

Since the "/" represents division, you need to do the inverse of dividing which is multiplication. You would need to multiply on both sides of the equation.

x = 3 x -2

x = -6

And there you have it, the answer for the first problem!

You again, isolate the x for the second equation as well.

-9x = -9

Since the x is directly next to the 9, indicating that it is multiplication. Do the inverse of multiplication which is division. Divide by -9 on both sides.

x=-9

Since -9/-9 cancels each other out, that leaves x by itself.

x = -9/-9

x = 1

You only end up cancelling out the number next to the variable, not the one on the other side. (if you are wondering why I didn't cross it out)

As for the third one, you can carry the -5 over to the -4, but since the inverse of -5 is +5, you add 5 to -4.

x = 1

As easy as that! You don't do the same as the two questions before because the number isn't right next to the variable.

For the fourth one, you isolate the x once more. You do the inverse of multiplication which is again, division. And again, the -5/-5 cancel out!

x = -5/25

x = -0.2

And finally, the last one!

You repeat the same steps as the third one. Add 2 on each side and cancel out 2 + 2 on the x's side.

x = 10 +2

x = 12

And that's all your answers. Hope you understood :)

4 0

3 years ago

Jasica Parker would like to have $46,000 to buy a new car in 6 years. To accumulate $ 46,000 in 6 years, how much should she i

guapka [62]

Answer: 690

Step-by-step explanation:

So, you should do

46,000 * 9% = 4,140

4,140 divided by 6 = 690

So your answer is 690

7 0

3 years ago

The sum of 3 times a number and 6 is 8: translate the sentence into an equation

serg [7]

Answer:

3x+6=8

Step-by-step explanation:

It says 3 times a number you know that it will be 3 times the variable. Next, it says the "sum of" so you know you will be adding 6 to the multiplication of 3 and the variable to equal 8.

4 0

3 years ago

Secant jkl and jmn are drawn to circle o from an external point ,j. if jk=8,lk=4 and jm=6 what is the length of jn answer

Archy [21]

See the picture attached to better understand the problem

we know that
If two secant segments are drawn to a circle from an exterior point, then the product of the measures of one secant segment and its external secant segment is equal to the product of the measures of the other secant segment and its external secant segment.
so
jl*jk=jn*jm------> jn=jl*jk/jm

we have
jk=8,lk=4 and jm=6
jl=8+4----> 12

jn=jl*jk/jm-----> jn=12*8/6----> jn=16

the answer is
jn=16

6 0

4 years ago