Across
1
U-shaped curve of a quadratic function
5
Parts per hundred
7
Line touching circle at one point
9
Mathematical statement of equality
10
Sum divided by count
Down
2
Part of a whole number
3
The number representing nothing
4
Lines that never intersect
5
Number divisible only by 1 and itself
6
Mathematical rule or equation
8
Collection of distinct elements
11
Rectangular array of numbers