2.1-2.2

Question 1

a set of pairs of input and output values

Answer 1

relation

Question 2

a relation is the set of all inputs (x-coordinates)

Answer 2

domain

Question 3

a relation is the set of all outputs (y-coordinates)

Answer 3

range

Question 4

a map linking elements of the domain to corresponding elements of the range

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

tells if a graph is a function or not

Answer 6

vertical-line test

Question 7

f(x) is read as “f of x” or “a function f of x”

Answer 7

function notation

Question 8

a function whose graph is a line ex: f(x) = 3x + 2

Answer 8

linear function

Question 9

linear functions can be represented as ex: y = 3x + 2

Answer 9

linear equation

Question 10

the value of y depends on the value of x, y is called

Answer 10

dependent variable

Question 11

the x is called

Answer 11

independent variable

Question 12

a line is the point at which the line crosses the y-axis (0,b)

Answer 12

y-intercept

Question 13

a line is the point at which the line crosses the x-axis

Answer 13

x-intercept

Question 14

Ax + By = C where A,B, & C are real numbers znd A & B /= 0

Answer 14

standard dorm of a linear equation

Question 15

of a non-vertical line is the ratio of the vertical change to a corresponding horizontal change (m)

Answer 15

slope

Question 16

when you know the slope and point of a line, you can use - a line through point (x1, y1) with slope m is: y - y1 = m(x-x1)

Answer 16

point-slope form

Question 17

find slope by examining the equation - y = mx + b where m - slope and b = y - intercept

Answer 17

slope-intercept form