Page 132 - TB_6B

Activity 2 Linear Functions

Learn about linear functions.

Functions that can be represented as a straight line on a graph are

called linear functions.

A linear function can be graphed as a y y

straight line. Therefore, few ordered pairs x x
are needed to plot and connect the points

with a straight line.

The line represents all possible solutions for the equation.

Graph the function y = 1 x.
2
y
Write ordered pairs. 2

x2 1 0 1 2 x
2
y1 1 0 1 1 20
2 2 2

(x, y) ( 2, 1)

The ordered pairs on the graph can be connected by a straight line.

Therefore, y = 1 x is a linear function.
2

1 . Complete the table below and write the ordered pairs. y

Then graph the linear function y = x 3.

x 10 1 4 x
y2 2 24

Ordered pairs: ( 1, 2) , (, ) , (, ) 4 20
Connect the ordered pairs on the graph with a 2
straight line. 4
This line represents the function y = x 3.

29. Graph Functions 121