Across
1
Corner point of a polygon
3
Mathematical rule or equation
5
Number less than zero
6
Reference line in a graph
13
Sum divided by count
14
The number representing nothing
15
Steepness of a line
Down
2
Middle value in an ordered dataset
4
Split into equal parts
7
Amount of space an object occupies
8
Value that does not change
9
Parts per hundred
10
Number that divides evenly into another
11
Comparison of two quantities
12
Total distance around a shape