Across
1
Exact correspondence on both sides
4
Divisible by two
6
Value that does not change
7
Visual representation of data
9
Parts per hundred
11
Reference line in a graph
Down
1
Collection of distinct elements
2
Rectangular array of numbers
3
Three-sided polygon
5
Line segment connecting two circle points
8
U-shaped curve of a quadratic function
10
The number representing nothing