# Definitions Flashcards

Definition:

Proportion

Proportion is used to show how quantities and amounts are related to each other

Definition:

Direct proportion

There is a **direct proportion** between two values when one is a multiple of the other.

This means as one value increases so does the other, and if one value decreases so does the other.

Command Word:

Solve

Find the value of the unknown value/letter (often x)

Definition:

Constant of proportionality

Two values in proportion will always have a constant value that links them, we often label this k (and you will need to find it)

(think of this as the hourly rate)

Definition:

Proportional Expression

When two things are in proportion we can form an expression to show this, we have a special symbol for this (the one that looks like a fish)

Definition:

Square

to multiply a number by itself

Definition:

Cubic Graph

Graphs that has a cubed x in the equation

Definition:

Inverse Proportion

There is a **inverse proportion** between two values when they change in opposite directions.

This means as one value increases the other decreases , and if one value decreases the other increases.

Definition:

Inverse

the opposite/reverse of something

Command Word:

Evaluate

Find the numerical value/answer

Definition:

Indicies

Another name for **powers**, when we are dealing with multiple multiplications of a number

Definitions:

Exponential Graphs

Graphs where the equation is a number to the power of x

Command Word:

Sketch the graph

Draw a rough shape of the graph and label key points like:

- intercepts (x and y axis)
- turning points

Definition:

Area

The amount of space inside a 2D shape units cm squared

Definition:

Trapezium

A quadrilateral with one pair of parallel sides