Across
1
Number divisible only by 1 and itself
3
Part of a line with two endpoints
4
Math using letters for unknown values
10
Part of a circle's circumference
12
Sum divided by count
13
Repeated addition
Down
2
Visual representation of data
3
Steepness of a line
5
Line touching circle at one point
6
Single numeral from 0 to 9
7
Comparison of two quantities
8
Difference between highest and lowest values
9
System of ordered marks for measuring
11
Amount of space an object occupies