Across
1
Mathematical rule or equation
5
Amount of space an object occupies
6
Symbol representing unknown value
7
Split into equal parts
8
Visual representation of data
9
Space between two intersecting lines
10
Closed shape with straight sides
Down
1
Number that divides evenly into another
2
Reference line in a graph
3
Repeated addition
4
Line crossing from corner to corner
11
Single numeral from 0 to 9
12
Difference between highest and lowest values
13
The number representing nothing