Grade 4 - Progress in Mathematics

Use the equation y 5 x 4 3 for exercises 1–3.

1. Complete the function table.


2. Write the values of xand yas
   ordered pairs.


3. Graph the ordered pairs on
   a coordinate grid. Connect
   the points with a line.

Update your skills. See page 23.

Graph Equations

14-4

The function, or rule, of a function table can be an equation.

Yo u can graph an equation

on a coordinate grid.

To graph an equation:

• Write the values of xand y
  as ordered pairs (x,y).


• Graph the ordered pairs on
  a coordinate grid.


• Connect the points with a line.

10

9 8 7 6 5 4 3 2 1

0 1 2 3 4 5 6 7 8 9 10

Rule:y 5 x 43

Input x 3 6 9 12 15

Output y

Rule: y 52 x

Input (x) Output (y)

0 0

1 2

2 4

3 6

y
 2 x

When x
 0 , y
 0. When x
 1 , y
 2.

y
2( 0 ) y
2( 1 )

y
 0 y
 2

Write: (0,0) Write: (1,2)

When x
 2 , y
 4. When x
 3 , y
 6.

y
2( 2 ) y
2( 3 )

y
 4 y
 6

Write: (2,4) Write: (3,6 )

1.5

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