Across
1
Reference line in a graph
4
Symbol representing unknown value
5
Difference between highest and lowest values
10
Value that does not change
11
Result of addition
Down
2
Visual representation of data
3
Line crossing from corner to corner
6
Sum divided by count
7
Rectangular array of numbers
8
Mathematical statement of equality
9
Collection of distinct elements
10
Round shape with all points equidistant