Pls help
2 answers:
Answer:
4. C)
3. B) 9,6 = the number of points you would increase each hour of studying; 65,8 = your score if you studied 0 hours
2. B) The events have a strong positive linear correlation.
1. C) Find the slope using the slope formula:
Step-by-step explanation:
4. (−7, 10) → 10 = 7 + 3 ☑
(−1, 4) → 4 = 1 + 3 ☑
(0, 3) → 3 = 0 + 3 ☑
(3, −2) → −2 ≠ −3 + 3; 0 ☒
3. You obviously have to plug "0" in for x to get your initial value of 65,8, which represents the minimum value of points you would receive if you never were to study, and of course, the 9,6 is the average score increased for every hour studied.
2. The correlation coefficient is 0,02, which is positive, so this would be the obvious choice.
1. You CANNOT write a linear equation without FIRST finding the rate of change [slope]. You will ALWAYS need the rate of change in order to write any linear equation.
I am joyous to assist you anytime.
Answer:
The first step to write an equation is slope-intercept form is to find the slope using the formula
Therefore, the answer to question 1 is C.
On the other hand, when a correlation coefficient is near to zero, that means there's no correlation between variables. So, in this case, we have a coefficient of r = 0.02, which is really close to zero.
Therefore, the answer to question 2 is D. There is little or no linear correlation.
The linear regression in question 3 is
Where, represents hours and
the score.
Now, according to this relation, the minimum score you can get is 65.8, that is, if you studied zero hours, you get 65.8. And 9.6 represents the increase in points per hour studied.
Therefore, the right answer for question 3 is B.
In question 4, the given expression is
Now, to find the right answer, we need to test each point and see which one satisfy the equation
For (0,3)
This means choice A appears as a solution.
For (-1,4)
Option B also appears as solution
For (3,-2)
Choice C doesn't appear as solution.
Therefore, the right answer is C.
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<h2>Greetings!</h2>
<h2>Hope this helps!</h2>
Answer:
B and E
Step-by-step explanation:
The rules of indicies states:
÷
=
So ÷
=
=
So that means B is one of the correct answers.
To find the other correct value, you can divide the two fractions as stated in the question:
by
=
81 is equivalent to 3⁴
So that means E is also correct.
<h2>Hope this helps!</h2>
So this is essentially a proportion problem. They want you to be able to recognize a relationship between the two. The easiest way to go about this is to draw a picture (I have included one). What you want to do is notice that you are given both shadow lengths. This is essentially going to be your first step to creating the proportion.
Understanding that we know the shadow lengths, we can turn these into a fraction such as so:
4ft/20ft.
Now that we know that, we need to look at are unknown. Our unknown is the height of the utility pole. We can solve this by substituting for X since we know the utility worker is 5.5 ft tall.
Your fraction for that would look like:
5.5ft/X
Make sure to always make your top to top match, such as since I put the utility worker's shadow on top, I need to put his height on top.
Now we can solve.
4ft/20ft =5.5ft/X
We need to cross multiply to get an equation we can work with. If we cross multiply, Your equation will look like:
4x = 110ft
This is a simple one step equation. Divide both sides by 4 to get your answer.
x= 27.5ft.
This means your Utility pole's height is 27.5ft.
