| Term | Definition |
|---|
| numerical expression | consists of numbers and operations |
| variable | a letter used to represent one or more numbers |
| variable expression | consists of numbers, variables, and operations |
| evaluate | substitute a number for each variable and solve the resulting numerical expression |
| verbal model | describes a problem using words as labels and using math symbols to relate the words |
| power | the reult of a repeated multiplication of the same factor |
| base | the factor of the repeated multiplication |
| exponent | shows the number of times the base is used as a factor |
| order of operations | a set of rules on evaluating expressions involving more than one operation |
| integer | a number w/o a fraction part |
| negative integer | integer less than 0 |
| positive integer | integer greater than 0 |
| absolute value | the distance of a number from 0 on a number line |
| opposites | 2 numbers with the same absolute value but dif. signs |
| additive inverse | the opposite of a # (a+(-a)=0) |
| coordinate plane | formed by the intersection of a horizontal number line called the x-axis and a vertical number line called the y-axis. The axes meet at a point. |
| x- axis | the horizontal number line in a coordinate plane |
| x- coordinate | the 1st number in an ordered pair representing a point in a coordinate plane |
| y- axis | the vertical number line in a coordinate plane |
| y- coordinate | the 2nd number in an ordered pair representing a point in a coordinate plane |
| origin | the point (0,0) where the x- axis and y- axis meet in a coordinate plane |
| ordered pair | a pair of numbers (x, y) that can be used to represent a point in a coordinate plane. The 1st # is the x- coordinate, and the 2nd # is the y- coordinate. |
| quadrant | 1 of the 4 regions that a coordinate plane is divided into by the x- axis and the y- axis |
| scatter plot | a graph in a coordinate plane that displays paired data. Ea. data pair is plotted as a point. |
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