# Alg 2 Unit 2 Terms

## 24 terms

### scatter plot

a graph that relates two different sets of data by plotting the data as ordered pairs

### trend line

a line that approximates the relationship between the data sets of a scatter plot.

### absolute value function

a function of the form f(x) = |mx+b| + c, where m cannot equal 0

### vertex

a function is a point where the function reaches a maximum or minimum

### translation

an operation that shifts a graph horizontally, vertically, or both

### parent function

a family of functions is a group of functions with common characteristics. a parent function is the simplest function with these characteristics.

### linear inequality

an inequality in two variables whose graph is a region of the coordinate plane that is bounded by a line

### relation

a set of pairs of input and output values

### domain

a relation is the set of all inputs, or x-coordinates, or the ordered pairs

### ranges

a relation is the set of all outputs, or y-coordinates, of the ordered pairs

### mapping diagram

links elements of the domain with corresponding elements of the range

### function

a relation in which each element of the domain is paired with exactly one element in the range

### vertical-line test

you can use the vertical-line test to determine whether the relation has a least one element of the domain paired with more than one element of the range

f(x)

### linear function

a function whose graph is a line

y=3x+2

the Y axis

the X axis

### slope

the line is the ration of the difference of the y-coordinates to the corresponding difference of the x-coordinates

ax + by = C

### point-slope form

y - y1 = m(x - x1)

y = mx + b

### direct variation

a linear function defined by an equation of the form y=kx, where k never equals 0

### constant variation

when x and y are variables, you can write k = y/x