Across
1
Amount of space an object occupies
4
Steepness of a line
5
Reference line in a graph
7
Math using letters for unknown values
8
Part of a whole number
11
Result of raising a number to an exponent
Down
1
Symbol representing unknown value
2
Comparison of two quantities
3
Space between two intersecting lines
6
Result of addition
9
Sum divided by count
10
Divisible by two
12
Split into equal parts
13
Rectangular array of numbers