3
If the slope of a line is m then the slope of an altitude to that line is -1/m.
The slope of both lines will be the same.
To find the slope of a perpendicular line, take the negative reciprocal of the slope of the given line. (Flip the top and bottom of the fraction and change the sign.) The slope of 3 can be written as 3/1. The slope of a line that is perpendicular is -1/3.
A straight, horizontal line.
3
Any line that is parallel to another line will have the same slope. So if line AB's slope is zero and line CD is parallel to AB, then its slope will also be zero. The slope of line CD, when perpendicular to AB, will be infinity. If line AB has a slope of zero that means its just a horizontal line passing some point on the y-axis. A line that is perpendicualr to this one will pass through some point on the x-axis and therefore have an infinite slope.
The slope of line AB will be 1/2. Two parallel lines will always have the same slope, so if you know the slope of one line that is parallel to another, you know the other line's slope.
Slope of perpendicular line is the negative reciprocal. So it is -1/4
-1/2 or -0.50
0.5
If the slope of a line is m then the slope of an altitude to that line is -1/m.
Parallel lines have the same slope. So if you know the slope of a line in question, or you can calculate it, then you know the slope of any line parallel to that line.
The slope of both lines will be the same.
the slope of a line = the Change in Y divided by the Change in X
you look at the line and see if there are any direct points on the line the slope formula
negative 1/2