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aliahauyon20
19.02.2021 •
Mathematics
Robert says that the slope of a line passing through (1,7) and (3,9) is equal to the ratio 1-3/7-9 is this correct
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Ответ:
to find the slope it is (y2-y1)/(x2-x1)
so in this case it would be (9-7)/(3-1)
Ответ:
AnsYou want to find the equation for a line that passes through the two points:
(0,5) and (-8,0).
First of all, remember what the equation of a line is:
y = mx+b
Where:
m is the slope, and
b is the y-intercept
First, let's find what m is, the slope of the line...
The slope of a line is a measure of how fast the line "goes up" or "goes down". A large slope means the line goes up or down really fast (a very steep line). Small slopes means the line isn't very steep. A slope of zero means the line has no steepness at all; it is perfectly horizontal.
For lines like these, the slope is always defined as "the change in y over the change in x" or, in equation form:
So what we need now are the two points you gave that the line passes through. Let's call the first point you gave, (0,5), point #1, so the x and y numbers given will be called x1 and y1. Or, x1=0 and y1=5.
Also, let's call the second point you gave, (-8,0), point #2, so the x and y numbers here will be called x2 and y2. Or, x2=-8 and y2=0.
Now, just plug the numbers into the formula for m above