Across
1
Mathematical rule or equation
4
Number less than zero
5
Visual representation of data
6
Reference line in a graph
7
Round shape with all points equidistant
11
The number representing nothing
Down
2
Sum divided by count
3
Symbol representing unknown value
8
Parts per hundred
9
Middle value in an ordered dataset
10
Total distance around a shape
12
Steepness of a line