# math

## 17 terms

### constant of variation

the number k in equations of the form y=kx

### direct variation

an equation of the form y=kx, where k=/ 0

### family of graphs

graphs and equations of graphs that at least one characteristics in common

### parallel lines

lines in the same plane that never intersect and have the same slope

### parent graphs

the simplest of the graphs in a family of graphs

### perpendicular lines

lines that meet to form right angles

### point-slope form

an equation of the form y-y1=m(x-x1), where m is the slope and x1, y1 is a given point on a nonverticle line.

### slope

the ratio of the change in the y- coordinates(rise) to the corresponding change in the x-coordinates(run) as you move from one point to another along a line

### slope-intercept form

an equation of the form y=mx+b, where m is the slope and b is the y intercept

For all rational numbers a, b, and c, if a < b, then a + c < b + c

### compound inequality

two or more inequalities that are connected by the words and or or

a/b^b/a

### intersection

the graph of a compound inequality containing and; the solution is the set of elements common to both inequalities

ab^ba

### set-builder notation

a concise way of writing a solution set. For example {t/t^17} represents the set of all numbers t such that t is less than 17

a-b^b-a

### union

the graph of a compound inequality containing or: the solution is a solution of neither inequality, not necessarily both

### Flickr Creative Commons Images

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