Across
1
Reference line in a graph
4
Number divisible only by 1 and itself
5
Result of raising a number to an exponent
7
Line touching circle at one point
8
Divisible by two
9
Math using letters for unknown values
Down
2
Symbol representing unknown value
3
Part of a line with two endpoints
6
Part of a whole number
10
Round shape with all points equidistant
11
U-shaped curve of a quadratic function
12
Steepness of a line