Across
1
Reference line in a graph
3
U-shaped curve of a quadratic function
4
Result of raising a number to an exponent
8
Number greater than zero
Down
2
Difference between highest and lowest values
3
Number divisible only by 1 and itself
4
Parts per hundred
5
Exact correspondence on both sides
6
Longest side of a right triangle
7
Math using letters for unknown values