Math- Lines Flashcards
1
Q
What does the slope of the line equal
A
It equals rise/run or (y2 - y1) / (x2 - x1)
2
Q
How to find the x intercept
A
Set y equal to zero in the equation and solve for x
3
Q
How to find the y intercept
A
Set x equal to zero and solve for y
4
Q
What is slope-intercept form?
A
y = mx + b the slope is m and the y intercept is b
5
Q
What is point slope form
A
y - y1 = m(x - x1) Where m is the slope and (x1 , y1) is a point on the line
6
Q
What is the slope if lines are parallel
A
The slope is equal
7
Q
What is the slope for perpendicular lines
A
The slope of one is the negative reciprocal of the other.
Ex. 2 and -1/2
8
Q
What is the equation for a line that is vertical and x = 3
A
x = 3
9
Q
What is the equation for a horizontal line that passes through (0,3)
A
y = 3
