Vocabulary
This is the point where a graph crosses the x-axis.
x-intercept
A relation where every input has exactly one output.
function
Solve: x + 5 = 12.
x = 7
The vertical axis on a graph.
y-axis
Symbol meaning "greater than."
>
This is the point where a graph crosses the y-axis.
y-intercept
A graph that is a straight line.
linear function
Solve: 3x = 18.
x = 6
The horizontal axis on a graph.
x-axis
Symbol meaning "less than or equal to."
≤
This tells how steep a line is.
slope
The variable that is usually on the horizontal axis.
independent variable
Solve: 2x − 4 = 10.
x = 7
The point (0,0).
origin
When graphing x > 3, use this type of circle.
open circle
This is the set of all possible x-values.
domain
The variable that depends on the input.
dependent variable
The opposite operation of multiplication.
division
A pair of numbers used to locate a point.
ordered pair
When graphing x ≤ 3, use this type of circle.
closed circle
This is the set of all possible y-values.
range
A graph that passes the vertical line test is called this.
a function
The process of getting a variable by itself.
isolate the variable
The four sections of the coordinate plane.
quadrants
Multiplying or dividing an inequality by a negative does this to the sign
flips (reverses) the inequality sign