Across
1
Three-sided polygon
5
Amount of space an object occupies
7
Part of a whole number
8
Parts per hundred
9
Single numeral from 0 to 9
11
Visual representation of data
Down
2
Result of raising a number to an exponent
3
Reference line in a graph
4
Repeated addition
6
Difference between highest and lowest values
10
The number representing nothing
12
Steepness of a line
13
Number divisible only by 1 and itself