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Sladkaya [172]
2 years ago
5

Use quadratic regression to find a

Mathematics
1 answer:
fredd [130]2 years ago
6 0

Answer:

1x² + 1x -3

Step-by-step explanation:

A quadratic regression is the process of finding the equation of the parabola that best fits a set of data. As a result, we get an equation of the form: y=ax^2+bx+c \text{ where } a\ne0 .

To compute manually the values of a, b and c is a rather complicated process using a technique known as least squares method.

However, we can use a scientific calculator to compute the three values and arrive at the quadratic equation

Using the points provided, the values are:

a = 1, b = 1, c = -3

The function is 1x² + 1x -3

Note that this is a best-fit function it does not necessarily pass through all 3 points but approximates. The attached graph shows that the function does indeed pass through 2 of the 3 points

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8 0
2 years ago
How can you know if this equation is true? 1/2+3/8=4/10=2/5
allsm [11]
Well first you should know that 4/10 is simplified to 2/5 so that part is correct
But to know of the rest is correct , add the Fractions
so the common denominator will be 8 so 1/2 will become 4/8 + 3/8 = 7/8 but 7/8 does not equal 4/10
7 0
3 years ago
How to change 7/10 to a percent
Ulleksa [173]

Answer:

70%

Step-by-step explanation:

since 7/10 is 0.7 as a decimal

you can then turn it into a percent by moving the decimal point two spots to the right

70 --> 70%

another way to do it is, to add zeros on both the numerator and denominator

then it is valued at 70/100

a percent is a number over 100

70 ---> 70%

your answer is 70%

hope this helps

7 0
2 years ago
Write an equation that represents the following problem. There are two cell phone plans available from Cell Phones R Us company.
ANTONII [103]
If every .01=m so we have 35+5m=50+m
7 0
3 years ago
Read 2 more answers
Suppose the average tread-life of a certain brand of tire is 42,000 miles and that this mileage follows the exponential probabil
Ahat [919]

Answer: The probability that a randomly selected tire will have a tread-life of less than 65,000 miles is 0.7872 .

Step-by-step explanation:

The cumulative distribution function for exponential distribution is :-

P(X\leq x)=1-e^{\frac{-x}{\lambda}}, where \lambda is the mean of the distribution.

As per given , we have

Average tread-life of a certain brand of tire :  \lambda=\text{42,000 miles }

Now , the probability that a randomly selected tire will have a tread-life of less than 65,000 miles will be :

P(X\leq 65000)=1-e^{\frac{-65000}{42000}}\\\\=1-e^{-1.54761}\\\\=1-0.212755853158\\\\=0.787244146842\approx0.7872

Hence , the probability that a randomly selected tire will have a tread-life of less than 65,000 miles is 0.7872 .

8 0
3 years ago
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