Across
1
U-shaped curve of a quadratic function
3
Split into equal parts
8
Exact correspondence on both sides
9
Mathematical statement of equality
10
Line touching circle at one point
12
Difference between highest and lowest values
13
Part of a whole number
Down
2
Math using letters for unknown values
4
System of ordered marks for measuring
5
Comparison of two quantities
6
Symbol representing unknown value
7
Divisible by two
11
Visual representation of data