Across
1
Reference line in a graph
3
Closed shape with straight sides
4
Number less than zero
7
The number representing nothing
8
Lines that never intersect
10
Number divisible only by 1 and itself
11
Rectangular array of numbers
12
Result of raising a number to an exponent
13
Number greater than zero
Down
2
Visual representation of data
3
Total distance around a shape
5
Steepness of a line
6
Line touching circle at one point
9
Mathematical rule or equation
14
Divisible by two