Grade 9 Math Exam Review

• The counting numbers (1,2,3,4,5...)
• All positive numbers

Numbers that create a perfect square (1,4,9,16,25...)

Numbers that create a perfect triangle (1,3,6,10...)

Any composite number

Natural numbers and 0

Positive numbers, negative numbers, 0

A number represented by a ratio or a fraction where the denominator is not 0.

• Same sign=always positive
• different signs=always negative

A horizontal slope will have an equation of where it meets the y axis. For example, if it crossed the y axis at +5, the equation would be y=5. The slope would be 0.

A vertical line will have an undefined slope because it will intersect the y axis at an indefinite amount of points.

a representation of a rate of change as a line on a graph

The horizontal axis representing the independent variable.

The vertical axis representing the dependent variable

an unknown value in an equation that is usually represented by a letter, such as x, y, r, s, t, a, b, n or k.

The amount of space within a 3 dimensional object, measured in cm cubed

the space within a 2 dimensional object, measured in units squared

the distance across a circle

the distance from the edge of the circle to the centre

• the perimeter of the circle
• formula: 2 x pi x radius

formula: pi x radius²