Across
1
Mathematical rule or equation
5
Math using letters for unknown values
6
Rectangular array of numbers
7
Part of a line with two endpoints
8
Repeated addition
9
Number divisible only by 1 and itself
10
Difference between highest and lowest values
Down
2
Comparison of two quantities
3
Visual representation of data
4
Distance from center to edge of circle
11
The number representing nothing
12
Middle value in an ordered dataset
13
Number less than zero