2-1 through 2-4

Question 1

a set of pairs of input and output values.

Answer 1

relation

Question 2

set of all inputs

Answer 2

domain

Question 3

set of all outputs

Answer 3

range

Question 4

links elements of the domain in one region and the element of the range in another.

Answer 4

mapping diagram

Question 5

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

Answer 5

function

Question 6

used to tell whether the relation is a function

Answer 6

vertical-line test

Question 7

f(x)

Answer 7

function notation

Question 8

a function whose graph is a line

Answer 8

linear function

Question 9

represents a linear function

Answer 9

linear equation

Question 10

what y is called

Answer 10

dependent variable

Question 11

x is called this

Answer 11

independent variable

Question 12

the point at which the line crosses the y-axis

Answer 12

y-intercept

Question 13

the point at which the line crosses the x axis

Answer 13

x-intercept

Question 14

Ax+By=C

Answer 14

standard form

Question 15

the ratio of the vertical change to a corresponding horizontal change

Answer 15

slope

Question 16

when you know the slope of a line, you can represent it as this

Answer 16

point-slope form

Question 17

Used to find slope by examining the equation

Answer 17

slope-intercept form

Question 18

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

Answer 18

scatter plot

Question 19

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

Answer 19

trend line