Across
1
Space between two intersecting lines
2
Number that divides evenly into another
5
Steepness of a line
6
Number with digits after a point
9
Line touching circle at one point
10
Reference line in a graph
Down
2
Mathematical rule or equation
3
Three-sided polygon
4
U-shaped curve of a quadratic function
7
Number less than zero
8
Value that does not change