Because b - a could be, for example, b = 5 and a = 7. So if the question were to be 5 - 7 = -2, that would be b - a. If you swap it around, then the question would be 7 - 5 = 2, and that would be a - b. I hope this helps.
Answer:
hope it will help u in understanding
Answer:
a)$ 324,000
ii) 2.5%
x=2, y=1
Step-by-step explanation:
(a)Simple interest is calculated by the formula
<em />
<em></em>
<em> I= Interest received</em>
<em>P=Principal</em>
<em>r= interest rate (per year)</em>
<em>t=time (in years)</em>
<em />
<em>I= ($900,000)(12)(3%)</em>
<em>I=$324,000</em>
<em />
(ii)From the formula above, we find r
<em>r=2.5%</em>
<em />
<em>_______________________________</em>
<em>3x+y=7</em>
<em>2x-2y=2</em>
<em />
<em>Let's take 2x-2y=2</em>
we divide by 2 both sides and we get
<em>x-y = 1</em>
so <em>x = 1+y</em>
and replace it in the other formula:
<em />
<em>3(1+y) + y = 7</em>
<em>3+3y+y = 7</em>
<em>3 + 4y = 7</em>
<em>4y = 7-3</em>
<em>4y= 4</em>
<em>y = 1</em>
<em>x = 1+y</em>
<em>x = 1+1</em>
<em>x = 2</em>
<em />
<em />
A scatter plot shows the association between the variables it measures
The association shown on the graph between x and y is (d) No association
<h3>How to determine the association</h3>
From the graph, we can see that the points on the plot are scattered, and they do not follow any pattern
This means that, there is no association between the x and y variables
Hence, the true statement is (d) No association
Read more about association at:
brainly.com/question/2749543
Answers:
- Graph B
- Choice C) y = 0.13x - 0.19
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Explanations:
- Notice how all of the points in graph B are near to a single line. This is the regression line. We don't have every point on the same line, but it's close enough. Graph A seems to suggest an exponential growth curve could work as the regression curve. Graph C seems to be randomly scattered points, so perhaps no function would work as the regression curve.
- I used technology to get the regression line. Specifically, I used GeoGebra. Any spreadsheet program or graphing calculator should be able to find the regression line. You can do so by hand, but I don't recommend it because it's tedious busy work in my opinion.