Across
1
Collection of distinct elements
3
Symbol representing unknown value
6
Number greater than zero
7
Steepness of a line
Down
2
Power to which a number is raised
4
Split into equal parts
5
Number with digits after a point
8
Single numeral from 0 to 9
9
Mathematical statement of equality
10
Part of a whole number
11
Reference line in a graph
12
Lines that never intersect