Which is true of a line?
2 answers:
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Answer:
Step-by-step explanation:
Coordinate points: (18, -7) and (18,2)
m= rise / run or
m = slope
(x1, y1) = coordinates of first point in the line
(x2, y2) = coordinates of second point in the line
So your rise is...
2 - (-7)
and you run is...
18 -18
Rise = 9
Run = 0
Now, do you see the issue...
You can not have a number over 0 (* a great way to remember is N/0 spells no: "N" being number and "0" being zero)
The slope or the equation 9 / 0 (9 divided by 0 or 9 over 0) is ERROR in the calculator which means the slope of these points are undefined
The line is vertical when this happens
*Side Note: if you were to have 0 as you rise and 9 as your run, 0/9 is ok because that means you have a zero slope meaning that you have a horizontal line
0 divide by 9 is zero
Given :
We know the identity
We use this property to simplify the left hand side
So
we know ,
when then
For
Add on both sides
Finally we add 2npi for general solution
So options C and D are correct