Across
1
U-shaped curve of a quadratic function
5
Middle value in an ordered dataset
6
Single numeral from 0 to 9
7
Sum divided by count
8
Part of a whole number
9
Mathematical rule or equation
12
Number less than zero
Down
1
Result of multiplication
2
The number representing nothing
3
Reference line in a graph
4
Mathematical statement of equality
10
Parts per hundred
11
Symbol representing unknown value