Across
1
Symbol representing unknown value
3
Lines that never intersect
5
Result of multiplication
6
Sum divided by count
7
Part of a whole number
9
Steepness of a line
Down
2
Parts per hundred
3
Closed shape with straight sides
4
Difference between highest and lowest values
7
Mathematical rule or equation
8
Number that divides evenly into another
10
Part of a line with two endpoints
11
U-shaped curve of a quadratic function
12
The number representing nothing