Formulas/Forms
Slope-Intercept Graphing
Point-Slope Form; Slope formula
Parallel and Perpendicular
Arithmetic Sequences
100
1. What is slope-intercept form?
y = mx + b
100
Do you start by graphing the slope or the y-intercept?
Y-intercept
100
2. What is point slope form?
y - y1 = m(x-x1)
OR (a simpler version)
y - __ = __ (x - __)
100
11. The slopes of parallel lines are ________.
equal
100
18. Find the common difference and the next 3 terms of the sequence:
14, 9, 4, ...
Common difference: -5.
Next 3 terms: -1, -6, -11
200
In slope-intercept form, what does "m" represent?
Slope
200
After you graph the y-intercept, how do you graph more points?
Use the slope
200
3. What is the slope formula?
y2 - y1
m = --------
x2 - x1
200
11. If a line has a slope of 3/4, a line parallel to it will also have a slope of ____.
3/4
200
True or false:
If you graph an arithmetic sequence, it forms a line.
True.
300
In slope-intercept form, what does "b" represent?
y-intercept
300
5b. y = -2x + 6.
What is the y-intercept?
6.
The ordered pair is (0, 6).
300
7. A line passes through (3, -20), m = 4.
Write an equation in point-slope form for this line.
y + 20 = 4(x - 3)
300
12. The slopes of perpendicular lines are ______ _________.
Opposite reciprocals.
300
True or false
If you graph an arithmetic sequence, the common difference and the slope of the line are equal.
True.
400
2. What is point-slope form?
y - y1 = m(x-x1)
OR (a simpler version)
y - __ = __ (x - __)
400
5b. y = -2x + 6.
What is the slope AS A FRACTION?
Hint: What number can you divide by without changing the original value?
-2/1
400
8a. A line passes through (6, -3) and (4, 3)
Find the slope.
-3
400
12. A line has a slope of 3/4.
A line perpendicular to it will have a slope of _____.
-4/3
400
20.
What is the common difference for the graph?
4
(up 4, right 1 --> 4/1 = 4).
500
3. What is the formula to calculate slope?
y2 - y1
m = --------
x2 - x1
500
5b. y = -2x + 6.
The y-intercept is at (0,6).
How would you graph a second point?
Down 2, right 1
500
9. Given the points (2, 4) and (2, -3), find the slope.
Is this a vertical or horizontal line?
Vertical (undefined slope).
500
13.
a ll c because they both have a slope of -1/5.
500
21. 
-3