math (goated teacher

Expression

Is a number, a variable, or a combination of numbers and variables

Equation

Consists of two expressions

Linear equation in one variable

Also known as first degree equation

Solving an equation

Means finding the value of the variable

Linear equations

Can be compared to a balanced scale

Solution set

Consists of all values that make the equation true

The equal sign

Indicates that the number or expression on the left side is the same as the number or expression on the right side

<

Less than

>

Greater than

Inequality

Is a statement that two expressions are not equal

TPI

If x is less than y and y is less than z, then x is less than z

MPI

When the same negative number is multiplied or divided to both sides of an inequality

MPI

When the same positive number is multiplied or divided to both sides of an inequality

API

When the same number is added or subtracted to both sides of an inequality

Linear equation in two variables

Has an infinite number of solutions

The graph of a linear equation in two variables

Is a straight line that can be illustrated in a Cartesian plane

The slope of a line

Is the level of inclination or steepness of a line.

The slope of a horizontal line

Zero

The slope of a vertical line

Undefined

Intercept

Is a point that intersects a particular axis.

Inconsistent system

If the two lines do not intersect. The graph of this kind of system is a pair of parallel lines.

Consistent and dependent system

If the two lines intersect at an infinite number of points.

Consistent and independent system

If the two lines intersect only at one point.