Lines
Lines are composed of these.
What are points?
Change in y over change in x
What is how to calculate slope?
The point where the line crosses the y-axis
What is the y-intercept?
Ax + By = C
What is the standard form of a linear equation?
All points whose coordinates make the equation true.
What is the graph of an equation?
The length of any line.
What is infinity?
This type of line has 0 slope.
What is a horizontal line?
The y coordinate of all points on the x axis
What is zero?
1x + 0y = 4
What is the standard form of the line x = 4?
Make a table of values, plot the points and connect them.
How do you graph a line?
Standard, slope-intercept, and point-slope
What are the forms of linear equations?
This type of line has an undefined slope.
What is a vertical line?
The x coordinate of all points on the y-axis
What is zero?
y = mx + b
What is slope-intercept form?
They have the same slope.
What are parallel lines?
(0,0), (1, -1), (2, -2), (3, -3) are on this line.
What is y = -x?
The change in x between two points on the line
What is run? . . . or what is delta x?
Substitute 0 for x and solve for y
What is how to find the y-intercept?
Start at the y intercept, then use the slope to find a second point on the line.
How do we graph using the slope-intercept form?
They have opposite reciprocal slopes.
What are perpendicular lines?
(-2, 7), (-1, 7), (0, 7), (1, 7) and (2, 7) are on this line.
What is the line y = 7?
Up 3, right 4
How do you graph a slope of 3/4?
Substitute 0 for y and solve for x.
What is how to find the x-intercept?
It's the easiest method to use for graphing when the equation is in Standard Form.
What is the intercept-intercept method of graphing?
(0,0), (1,1), (2,2), (3,3) are on this line.
What is the line y = x?