0.4 Lines Flashcards
1
Q
Find slope of a line
A
2
Q
What is the slope of the line containing the points(3, –2) and (0, 1) ?
A
-1
3
Q
Point-Slope form of an equation
A
y − y1 = m(x − x1)
where m is the slope
4
Q
slope-intercept form
A
y = mx + b.
5
Q
How do you know if lines are parallel?
A
same slope
6
Q
How do you know if lines are perpendicular?
A
the slopes are opposite reciprocals
m1 =2 m2= -1/2
7
Q
how do you know if a line is vertical?
A
x
x= 1
x=2
8
Q
How do you know if a line is horizontal?
A
y
y= 1
y=6
