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Plot ordered pairs from a table of values

Given a table pairing input and output values, the learner interprets each row as an ordered pair (x,y)(x,y) and locates it on a coordinate plane, using the horizontal xx-coordinate and vertical yy-coordinate with an appropriate scale, including negative or fractional values when present. Accurate plotting preserves the correspondence between quantities and provides a visual representation of a linear relationship that can be connected to patterns and equations; advanced function notation and curve analysis are not included.

Detailed Explanation: Plot ordered pairs from a table of values

A table of values gives matching xx- and yy-coordinates. Each row becomes one ordered pair:

(x,y)(x,y)

The xx-coordinate tells you how far to move horizontally. The yy-coordinate tells you how far to move vertically.

Example

Plot the values in this table:

xxyy
−2-244
−1-122
0000
11−2-2
22−4-4

Step 1: Turn each row into an ordered pair

Read the xx-value first and the yy-value second:

(−2,4),(−1,2),(0,0),(1,−2),(2,−4)(-2,4),\quad (-1,2),\quad (0,0),\quad (1,-2),\quad (2,-4)

Step 2: Check the scale

Use a coordinate plane with each grid line representing 11 unit on both axes. The horizontal axis is the xx-axis, and the vertical axis is the yy-axis.

Step 3: Plot each point

Start at the origin, (0,0)(0,0).

  • For (−2,4)(-2,4), move 22 units left, then 44 units up.
  • For (−1,2)(-1,2), move 11 unit left, then 22 units up.
  • For (0,0)(0,0), stay at the origin.
  • For (1,−2)(1,-2), move 11 unit right, then 22 units down.
  • For (2,−4)(2,-4), move 22 units right, then 44 units down.

Place a dot at each location and label it if needed. Always move horizontally using the first number, xx, and vertically using the second number, yy. Keeping the values in the correct order makes sure each point matches its row in the table.

Learn by doing: Plot ordered pairs from a table of values

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