Chapter #5: Graphing Linear Equations and Functions
point
A fixed location on a coordinate plane; every point has a unique x-value and y-value.
linear function
A function whose graph is a line is a _?_ _?_. You can represent a _?_ _?_ with a linear equation.
slope = 0
A horizontal line has a slope that is equal to _?_.
negative slope
A line with _?_ _?_ slants downward from left to right.
positive slope
A line with _?_ _?_ slants upward from left to right.
undefined slope
A line with an _?_ _?_ is vertical.
slope-intercept form
A linear equation of a nonvertical line written as y = mx + b where m is the slope of the line and "b" is the y-intercept of the line.
linear equation
An equation whose graph forms a straight line.
perpendicular lines
Lines that intersect to form right angles. Two lines are perpendicular if the product of their slopes is -1.
standard form of a linear equation
The form of a linear equation Ax + By = C, where A, B and C are real numbers and A and B are not both zero.
Rate of Change
The relationship between two quantities that are changing. The _?_ of _?_ is also called the slope.
slope
The relationship of the vertical change to the horizontal change.
intercept
The values of the points at which a line intersects (or cuts) the x-axis or y-axis.
x-intercept
The x-coordinate of the point where a line crosses the x-axis.
y-intercept
The y-coordinate of the point where a line crosses the y-axis.
parallel lines
Two lines in the same coordinate plan e that never intersect. Parallel lines have the same slope.
Ax + By = C
What is the standard form of a linear equation in algebra?