Across
1
Number divisible only by 1 and itself
3
Value that does not change
5
Difference between highest and lowest values
7
Part of a whole number
8
Sum divided by count
Down
2
Rectangle with four equal sides
4
U-shaped curve of a quadratic function
5
Comparison of two quantities
6
The number representing nothing
9
Line touching circle at one point
10
Reference line in a graph