Across
1
Number greater than zero
4
Math using letters for unknown values
5
Proven mathematical statement
6
Divisible by two
7
Steepness of a line
8
Lines that never intersect
9
Reference line in a graph
11
Middle value in an ordered dataset
12
Corner point of a polygon
Down
1
U-shaped curve of a quadratic function
2
Number less than zero
3
System of ordered marks for measuring
10
Part of a whole number
13
Result of raising a number to an exponent