Linear equation– an equation that uses only numbers, y, x, and the operations of addition, subtraction, multiplication, and division; also called a linear function. The graph of a linear equation is a line.
Integer values- whole numbers, both positive and negative and zero. Examples are infinite and include 1, 2, 3, -1, -2, -3, 945, and so on.
Equation- a mathematical sentence that uses an equal sign to show two quantities (shown using numbers and operators) are equal. For example, y = x + 8 is an equation.
Expression – a mathematical phrase that has numbers and operators but no equal sign or inequality sign.
The graph of an equation- the picture formed by plotting all the points that solve the equation.
Graphing an equation- the process of figuring out and plotting the points that solve an equation.
Ordered pair- two numbers in the form of (x,y) that give the location of a specific point; also called coordinates. For example, (2, 3) is an ordered pair.
Origin- the intersection of the horizontal and vertical axes, which has the ordered pair (0,0).
Point- one specific location on a plane; usually represented by a dot.
T-chart- an chart with two columns: x values and y values.
x-coordinate-the first number in an ordered pair; it tells the number of steps to take left or right along the horizontal axis.
y-coordinate- the second number in an ordered pair; it tells the number of steps to take up or down along the vertical axis.
Cartesian plane- a grid formed by a horizontal axis (called the x-axis) and a vertical axis (called the y-axis); also called a coordinate plane.
Solve an equation- figuring out which values for x and y make the equation true.