Across
1
Rectangle with four equal sides
4
Visual representation of data
5
Symbol representing unknown value
9
Repeated addition
Down
1
System of ordered marks for measuring
2
U-shaped curve of a quadratic function
3
Divisible by two
6
Sum divided by count
7
Part of a line with two endpoints
8
Number with digits after a point
10
Number divisible only by 1 and itself