Math Word Puzzle

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8
9
3
2
4
6
1
12
5
10
11
7

Across

1

Visual representation of data

4

Symbol representing unknown value

5

Reference line in a graph

7

Sum divided by count

9

Number with digits after a point

Down

2

Number less than zero

3

Middle value in an ordered dataset

6

Part of a circle's circumference

8

Part of a whole number

10

Rectangular array of numbers

11

Part of a line with two endpoints

12

U-shaped curve of a quadratic function