Answer:
Step-by-step explanation:
To find the slope, use 2 coordinates from your table and plug them into the slope equation, which is
Let's use the first 2 coordinates (-1, -2) and (0, -4). Plugging into the slope formula:
Therefore, we know that the slope is -2.
The y-intercept exists where x = 0. We see from our table that when x = 0, y = -4. So the y-intercept is -4.
To write our equation, we will use the slope-intercept form of a line, which is
y = mx + b, where m is the slope and b is the y-intercept. Plugging in both our values for slope and the y-intercept:
y = -2x - 4
B) 18
If it's wrong I'm
If it's right then it's a lucky guess
Answer:
7.1
Step-by-step explanation:
First add up all the numbers and divide by amount of numbers
Then subtract the average from all the numbers and add them up again
and then divide by amount of numbers
Answer:
-2007/4018
Step-by-step explanation:
1. Given
(1/3+1/4+...+1/2009)(1+1/2+...1/2008) - (1+1/3+1/4+...+1/2009)(1/2+1/3+...+1/2008)
2. Set new variable
k = 1/3+1/4+...+1/2008
3. Rewrite the equation
(k+1/2009)(1+1/2+k) - (1+k+1/2009)(1/2+k)
4. Simplify
(k+1/2009)(k+3/2) - (k+2010/2009)(k+1/2)
5. Expand
[k^2 + (1/2009 + 3/2)k + (1/2009)(3/2)] - [k^2 - (2010/2009+1/2)k - (2010/2009)(1/2)]
6. Rewrite
(1/2009 + 3/2 - 2010/2009 - 1/2)k + (1/2009)(3/2) - (2010/2009)(1/2)
7. Simplify
(3/2 - 2009/2009 - 1/2)k + 1/2(3/2009-2010/2009)
8. Evaluate
0*k + 1/2(-2007/2009)
= -2007/4018