Across
1
Power to which a number is raised
3
Reference line in a graph
5
Mathematical rule or equation
7
Part of a whole number
8
Middle value in an ordered dataset
10
Difference between highest and lowest values
12
The number representing nothing
13
Three-sided polygon
Down
2
Steepness of a line
3
Math using letters for unknown values
4
Total distance around a shape
6
Longest side of a right triangle
9
Rectangular array of numbers
11
Lines that never intersect