Across
1
Closed shape with straight sides
5
Steepness of a line
6
Line crossing from corner to corner
9
Symbol representing unknown value
10
Rectangular array of numbers
13
Rectangle with four equal sides
15
Corner point of a polygon
Down
2
Repeated addition
3
Exact correspondence on both sides
4
Result of multiplication
7
Number less than zero
8
Part of a whole number
11
Comparison of two quantities
12
Reference line in a graph
14
Visual representation of data