Across
1
Symbol representing unknown value
4
Reference line in a graph
5
Visual representation of data
6
Lines that never intersect
8
Repeated addition
9
Power to which a number is raised
10
Space between two intersecting lines
Down
2
System of ordered marks for measuring
3
Number less than zero
6
Parts per hundred
7
Corner point of a polygon
11
Number greater than zero
12
Closed shape with straight sides