Across
1
Reference line in a graph
4
Middle value in an ordered dataset
5
Divisible by two
8
Longest side of a right triangle
9
System of ordered marks for measuring
10
Symbol representing unknown value
Down
2
Visual representation of data
3
Three-sided polygon
4
Rectangular array of numbers
5
Power to which a number is raised
6
Rectangle with four equal sides
7
Number divisible only by 1 and itself
11
The number representing nothing