Across
1
Rectangular array of numbers
3
Divisible by two
7
Repeated addition
9
Symbol representing unknown value
10
Line crossing from corner to corner
13
Comparison of two quantities
Down
2
Split into equal parts
4
Part of a circle's circumference
5
Proven mathematical statement
6
Collection of distinct elements
8
Visual representation of data
11
Reference line in a graph
12
Value that does not change