Across
1
Mathematical rule or equation
4
Sum divided by count
7
Result of multiplication
8
Space between two intersecting lines
12
Reference line in a graph
13
Lines that never intersect
Down
2
Closed shape with straight sides
3
Steepness of a line
5
Exact correspondence on both sides
6
Number that divides evenly into another
9
Visual representation of data
10
Rectangular array of numbers
11
Repeated addition