1. How did you find the slope of the line?
2. What is the trend of the graph? Is it increasing? Or decreasing?
3. What is the slope of each increasing graph? What are the signs of the slopes?
4. What is the slope of the decreasing graph? What is the sign of the slope?
5. Do the graphs represent linear functions? Why or why not?
6. What is the slope of the horizontal line? How about the vertical line?
Answers
a) The slope will be the same for a straight line no matter which two points you pick as you know. All you need to do is to calculate the difference in the y coordinates of the 2 points and divide that by the difference of the x coordinates of the points(rise over run). That will give you the slope.
b) the trend of the graph is pattern Moving average over a few days will show the trend more clearly than daily raw data. As other suggested, a time series would model this more accurately because the data has too much variation from day to day.
You can do a simplified time series using Excel using their built in forecast tool under the data tab. If you have the raw data, it will give you a general trend along with the confidence interval of the forecast
but I would need the pic I can't say how ur graph is like..
c) higher positive slope means a steeper upward tilt to the curve, which you can see at higher output levels. A negative slope that is larger in absolute value
sorry I couldn't complete ur whole answers I have something if I get time I hope I will complete this answers for you