Maths

4. A line graph commonly used to display the frequency of data points.
5. A number or letter representing an unknown value in an algebraic expression.
8. The process of finding the mean of a set of data values.
10. The operation opposite of addition in an algebraic expression.
11. An algebraic term involving only constants and no variables (like "7").
12. The value obtained when substituting a number into an algebraic expression.

1. A type of chart that displays data using bars (used in Data Handling).
2. An expression that includes variables, constants, and mathematical operations (Algebraic Expressions).
3. The most frequent number in a set of data values (Data Handling).
6. The sum of all values in a data set divided by the number of values (similar to the mean).
7. A visual representation of data using circles, often divided into segments to show percentages (Data Handling).
9. A measure of the spread of data, calculated as the difference between the highest and lowest values.