Across
1
Rectangular array of numbers
4
Number that divides evenly into another
5
Middle value in an ordered dataset
6
Symbol representing unknown value
11
System of ordered marks for measuring
12
Number with digits after a point
13
The number representing nothing
15
Number greater than zero
Down
2
Value that does not change
3
Three-sided polygon
7
Visual representation of data
8
Reference line in a graph
9
Divisible by two
10
Number less than zero
14
Result of addition