Across
1
Mathematical statement of equality
3
Exact correspondence on both sides
6
Lines that never intersect
7
The number representing nothing
8
Difference between highest and lowest values
9
Comparison of two quantities
10
Closed shape with straight sides
11
U-shaped curve of a quadratic function
Down
2
Middle value in an ordered dataset
3
Steepness of a line
4
Sum divided by count
5
Power to which a number is raised
12
Result of multiplication