Across
1
Rectangle with four equal sides
3
Number divisible only by 1 and itself
4
Number less than zero
7
Power to which a number is raised
9
Space between two intersecting lines
10
U-shaped curve of a quadratic function
Down
2
Visual representation of data
3
Parts per hundred
5
The number representing nothing
6
Symbol representing unknown value
8
Steepness of a line
11
Corner point of a polygon
12
Single numeral from 0 to 9