Across
1
Reference line in a graph
3
Lines that never intersect
6
Steepness of a line
7
Number greater than zero
11
Number divisible only by 1 and itself
12
Parts per hundred
Down
1
Space between two intersecting lines
2
Collection of distinct elements
4
Number with digits after a point
5
Rectangular array of numbers
8
Visual representation of data
9
Part of a whole number
10
Symbol representing unknown value