What is the exponential regression equation that fits these data?

Mathematics

2 answers:

zlopas [31]2 years ago

6 0

Answer:

Option B) $y = (1.31)(2.8^{x})$ is the correct option.

Step-by-step explanation:

<em>Exponential function is the one where, a constant is raised to the power of x, a independent variable.</em>

Here, only option B and D are such exponential functions, while option A is linear and option C is quadratic in nature.

Now, to verify which option is correct, we will input the values and check which has the least difference between the given values.

Or we can use the cost function,

$J = \frac{((y(i))-y)^2}{2m}$ , to find which function has the least error.

By applying the above results,we find Option B is correct.

Lorico [155]2 years ago

3 0

Answer:

Correct Answer B

Step-by-step explanation:

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Anna has $430. She wants to buy a phone that costs $275. Anna will also have to pay a sales tax of 7%.

ki77a [65]

19.25 (tax)
294.25 (total price)
135.75 (money left)

REASONING:

In this word problem it says Anna has 430 dollars. The phone costs 275 dollars. It also says that when she buys the phone, she will have to pay a tax of 7%.

To find how much tax she will pay, we must do [275] x [0.07]

After inputting this into a calculator, you will get 19.25 (tax)

To find the total price, all you have to do is add 19.25 to 275. When you do this, you will get 294.25 dollars (total price)

To find how much money she has left,

430-294.25=135.75 (money left)

5 0

3 years ago

If tanA=a <br>then find sin4A-2sin2A/ sin4A+2sin2A

anygoal [31]

Answer:

The value of the given expression is

$\frac{sin4A-2sin2A}{sin4A+2sin2A}=-a^2$