I need help with graphs and scattered gram.
I need help with graphs and scattered gram.
if you have a bunch of points represented as (x,y) and if you are able to plot the points on a graph and connect all the lines using a straight line using a scale, you can say the relationship is linear.
for ex:
speed of travel (x-axis) Time (x-axis)
5 mph 100 min
10 mph 80 min
15 mph 60 min
20 mph 40 min
Plot these in a graph and let me know, Nice to know you are from Cincy, Go REDS!
If you are looking at a graph of y with relation to x (so y is on the vertical axis and x is on the horizontal), does it look like a line? If so, then you are dealing with a linear relationship.
If you are looking at a list of points, or a table of corresponding x and y values, look at the difference between x values and the difference between y values. If every time x goes up, y changes by a constant value, it's a linear relationship.
For instance:
x y
-1 4
1 7
3 10
5 13
appears to be a linear relationship because every time x goes up by 2, y goes up by 3. However
x y
-1 4
1 7
3 4
5 1
is not a linear relationship. The listed x values still go up by 2, but the y values go up and down. If you were to plot those points and connect the dots, they would not lie on the same straight line.
I can't see the exact problem you're looking at, but I hope that helps.
If x and y are related linearly, then the change of y over the change of x must be a constant, which is often called as slope.
That's mean that relation between x and y can be represented by Ax+By=C, where A, B and C are integers, and A is non-negative, and, A, B, and C have no common factors other than 1. If we solve this equation for y , we will get slope and y-intercept equation (y=mx+b)