横向
1
Symbol representing unknown value
5
Steepness of a line
6
U-shaped curve of a quadratic function
8
Value that does not change
9
Split into equal parts
12
Number divisible only by 1 and itself
13
Reference line in a graph
纵向
2
Round shape with all points equidistant
3
Number that divides evenly into another
4
Difference between highest and lowest values
7
Number with digits after a point
10
Longest side of a right triangle
11
Sum divided by count