Find Slope
(9, 10) and (1, 15)
-5/8
A slope that goes down from left to right on the graph.
negative slope
Write the equation of a line with a slope of 2 and y-intercept of -5.
What is y = 2x - 5
(4, 10) and (2,5)
5/2
(2,3) and (2, -4)
undefined
(10, 7) and (1,2)
5/9
A horizontal line
0 slope
Write the equation of the line with a slope of -1/2 and y intercept of 12.
What is y = -1/2x + 12
(5,6) and (10,9)
3/5
(1, -4) and (2, -4)
0
(2,1) and (6,2)
1/4
A vertical line
undefined slope
Write an equation of the line that passes through the points (-3, 4) and (2, -1).
y = -x + 1
(10,10) and (4,3)
7/6
(9, 3) and (9, -5)
undefined
(7,6) and (1,5)
1/6
Rises or goes up from left to right
positive slope
Write the equation of the line that passes through the points (0, 3) and (2, 5)
y = x + 3
(1,1) and (8,10)
9/7
(5, -2) and (4, -2)
0
(1,6) and (8,3)
-3/7
Formula for slope given a graph.
rise/run
Write the equation of the line through the points (-2, 4) and (3, -1).
y = -x + 2
(2,7) and (6,2)
-5/4
Explain how you know if the slope is undefined or zero.
If the numerator is zero, slope is zero. If the denominator is zero, the slope is undefined.