SME
Grade 5 Math · Geometry
Graph points on the coordinate plane
Use this for “Plot the point (9, 3),” or to name the coordinates of a point on the grid.
Chart
Start at 0.
Go 9 across, then 3 up: the point (9, 3).
This is an example. Type your own values to start a new problem.
Steps across from the origin
calculated
Steps up from the origin
calculated
First coordinate (across)
example
Second coordinate (up)
example
Formulas
0 + 9 = 9
Origin + steps across = first coordinate
0 + 3 = 3
Origin + steps up = second coordinate
Assumptions
•
The origin is (0, 0), where the two axes meet.
•
An ordered pair (across, up) gives the coordinates: start at the origin, go across the first number, then up the second.
•
Reading a point: count across from the origin to below the point, then up to it.
•
Whole numbers to 10, the grid drawn.
Step-by-step
WE KNOW
First coordinate (across): 9
Second coordinate (up): 3
FIND
steps across from the origin, steps up from the origin
Step 1 · Find steps across from the origin
Across ? from the origin: 9
Origin + steps across = first coordinate
The first number of the ordered pair says how far across to go.
Steps across from the origin = 9 − 0
Steps across from the origin = 9
Step 2 · Find steps up from the origin
Then up ?: 3
Origin + steps up = second coordinate
The second number of the ordered pair says how far up to go.
Steps up from the origin = 3 − 0
Steps up from the origin = 3
Check
Put the numbers back in. Both sides should match.
0 + 9 = 9 ✓
0 + 3 = 3 ✓
Topic check
See what you know: 5 questions on this topic
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