Lines equations Flashcards
1
Q
slope equation
A
m = (y2-y1)/(x2-x1)
2
Q
Slope-intercept
A
y = mx + b or f(x) = mx + b
3
Q
Point-Slope
A
y = m(x - x1) + y1 or y - y1 = m(x - x1)
4
Q
Slopes of perpendicular lines are
A
negative reciprocals
5
Q
Slopes of parallel lines are
A
the same
6
Q
Horizontal lines
A
y = b, slope = 0
7
Q
Vertical lines
A
x = a, slope is undefined
8
Q
To graph a line in slope-intercept form
A
- Graph the point (0, b) on the y-axis.
2. use the slope as rise over run. Up to right is positive , down to right is negative.
