Answer:
the answer is -1.8
Step-by-step explanation:
Answer:
I think it is A but not 100% sure.
Step-by-step explanation:
Answer:
C. The value for Group A is double the value for Group B
Step-by-step explanation:
First, you add all the numbers from each group.
A: The distance in total is 39.06
B: The distance in total is 19.53
To find the mean, which is another way of saying the average, you divide the sum with how many numbers there are. (hope this makes sense, I suck at wording)
A: There are 9 numbers in total, hence, 39.06/9 = 4.34
B: There are 9 numbers in total, hence, 19.53/9 = 2.17
Those are the mean distance for the two groups.
2.17 * 2 = 4.34
Hence, C (third statement)
Answer:
![y=3x+2](https://tex.z-dn.net/?f=y%3D3x%2B2)
Step-by-step explanation:
To find the equation, use the slope-intercept formula:
![y=mx+b](https://tex.z-dn.net/?f=y%3Dmx%2Bb)
m is the slope and b is the y-intercept. Now, it'll really help to draw a line through the points, connecting them. If you look at point (0,2), we can see that this is the y-intercept (where a point sits on the y-axis when x=0). You can insert this into the equation by taking the y value:
![(0,2)\\y=mx+2](https://tex.z-dn.net/?f=%280%2C2%29%5C%5Cy%3Dmx%2B2)
Now, take any two points to find the slope. To make it easier, I'll use (1,5) and (0,2). Use the slope formula for when you know two points:
![\frac{y(2)-y(1)}{x(2)-(x1)} =\frac{rise}{run}](https://tex.z-dn.net/?f=%5Cfrac%7By%282%29-y%281%29%7D%7Bx%282%29-%28x1%29%7D%20%3D%5Cfrac%7Brise%7D%7Brun%7D)
Rise over run is the change in the y-axis over the change in the x-axis. Insert values:
![(1(x1),5(y1))\\(0(x2),2(y2))\\\\\frac{2-5}{0-1}](https://tex.z-dn.net/?f=%281%28x1%29%2C5%28y1%29%29%5C%5C%280%28x2%29%2C2%28y2%29%29%5C%5C%5C%5C%5Cfrac%7B2-5%7D%7B0-1%7D)
Solve:
![\frac{2-5}{0-1}=\frac{-3}{-1}](https://tex.z-dn.net/?f=%5Cfrac%7B2-5%7D%7B0-1%7D%3D%5Cfrac%7B-3%7D%7B-1%7D)
Since both are negative, the result is a positive:
![\frac{-3}{-1}=\frac{3}{1} =3](https://tex.z-dn.net/?f=%5Cfrac%7B-3%7D%7B-1%7D%3D%5Cfrac%7B3%7D%7B1%7D%20%3D3)
Insert this into the equation as m, the slope:
![y=3x+2](https://tex.z-dn.net/?f=y%3D3x%2B2)
Done.