Across
1
Math using letters for unknown values
3
Result of raising a number to an exponent
4
Divisible by two
7
U-shaped curve of a quadratic function
8
Sum divided by count
9
Rectangular array of numbers
10
Lines that never intersect
11
Steepness of a line
Down
2
Collection of distinct elements
3
Total distance around a shape
5
Repeated addition
6
Amount of space an object occupies