Across
1
The number representing nothing
3
Mathematical rule or equation
6
Amount of space an object occupies
7
Part of a line with two endpoints
8
Result of multiplication
9
Sum divided by count
10
Difference between highest and lowest values
Down
2
Distance from center to edge of circle
4
Number less than zero
5
Result of raising a number to an exponent
7
Rectangle with four equal sides
11
Steepness of a line
12
Reference line in a graph