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PHMS7_PACH1
7th Grade Pre Algebra Words
| Question | Answer |
|---|---|
| algebra | a branch of mathematics dealing with symbols |
| algebra expression | an expression that contains sums and/or products of variables and numbers |
| coordinate plane | another name for coordinate system |
| coordinate system | a coordinate system is formed by the intersection of two number lines that meet at right angles at their zero points, also called a coordinate plane |
| counterexample | an example that shows conjecture is not true |
| deductive reasoning | the process of using facts, properties, or rules to justify reasoning or reach valid conclusions |
| defining a variable | choosing a variable and a quantity for the variable to represent in an equation |
| domain | the domain of relation is the set of all x-coordinates from each pair |
| equation | a mathematical sentence that contains an equal sign (=) |
| evaluate | find the numerical value of an expression |
| function | a function is a special relation in which each element of the domain is paired with exactly one element in the range |
| function rule | the operation performed on the input of a function |
| function table | a table organizing the input, rule, and output |
| graph | a dot at the point that corresponds to an ordered pair on a coordinate plane |
| numerical expression | a combination of numbers and operations such as addition, substraction, multiplication, and division |
| order of operations | the rules to follow when more than one operations is used in an expression. Think PEMDAS ***MD left to right and ***AS left to right |
| ordered pair | a pair of numbersused to locate any point on a coordinate plane |
| origin | the point at which the number lines intersect in a coordinate system |
| properties | statements that are true for any numbers |
| range | the range of a relation is the set of all y-coordinates from each ordered pair |
| relation | a set of ordered pairs |
| scatter plot | a graph that shows the relationship between two set of data |
| simplify | to write an expression in a simpler form |
| variable | a placeholder for any value |
| x-axis | the horizontal number line which helps to form the coordinate system |
| x-coordinate | the first number of an ordered pair |
| y-axis | the vertical number line wich helps to form the coordinate of a point where a graph crosses the y-axis |
| y-coordinate | the second number of an ordered pair. |