Across
1
U-shaped curve of a quadratic function
3
Divisible by two
5
Reference line in a graph
6
Split into equal parts
7
Number less than zero
Down
2
Sum divided by count
4
Difference between highest and lowest values
8
Mathematical statement of equality
9
Lines that never intersect
10
Round shape with all points equidistant
11
Line crossing from corner to corner
12
System of ordered marks for measuring