Across
1
Middle value in an ordered dataset
4
Reference line in a graph
6
Closed shape with straight sides
7
Single numeral from 0 to 9
8
U-shaped curve of a quadratic function
10
Math using letters for unknown values
11
Number greater than zero
12
Space between two intersecting lines
Down
2
Distance from center to edge of circle
3
Symbol representing unknown value
5
Part of a whole number
9
Visual representation of data
13
Part of a circle's circumference