EQAO Grade 9 Mathematics Practice Review

A set of vocabulary flashcards based on the EQAO Grade 9 Assessment of Mathematics, covering number sets, algebra, coding, data analysis, geometry, and financial literacy.

Rational Numbers

A subset of the number system that includes integers and decimals such as $36.4$ and $5.3$.

Real Numbers

A comprehensive set of numbers that encompasses both rational and irrational number subsets.

Perfect Squares

A sequence of numbers identified on a number line as $1, 4, 9, 16, 25, 36, 49$.

Density (of a set)

A measure used to compare how many numbers in a set exist within a specific range, such as positive integers being more dense than perfect squares between $0$ and $50$.

Scientific Notation

A method of representing numbers as a product of a decimal and a power of $10$, for example, $1.6384 \times 10^{-10}$.

Rate of Change

A comparison of how one variable increases or decreases relative to another, used to distinguish between different linear growing patterns.

Linear Relation

A relationship between two variables that can be represented by a straight line or an equation like $T = 2g + 3$.

Non-linear Relation

A relationship where the connection between variables does not form a straight line, as seen in specific data tables or graphs.

Slope

The steepness of a line in a linear equation, such as the value $6$ in $y = 6x$, which affects the orientation of the line.

y-intercept

The point where a line crosses the vertical axis; for example, if it decreases by $5$ in the equation $y = 12x - 5$.

Pseudocode

A text-based representation of an algorithm used to calculate mathematical outputs, such as the perimeter of a rectangle using the formula $2 \times \text{width} + 2 \times \text{length}$.

Subtotal

In coding for financial calculations, the sale price of an item before taxes are added, calculated as $\text{itemPrice} - (\text{itemPrice} \times \frac{\text{percentDiscount}}{100})$.

Outlier

A data point on a grid that is inconsistent with the general trend or clustering of the rest of the data set.

Box Plot

A graphical tool used to represent the distribution and count of community involvement hours categorized for a group of students.

Extrapolation

A strategy used in mathematical modelling to make predictions outside of the known data range, such as predicting future daylight hours from a trend graph.

Down Payment

The initial percentage or fixed amount paid upfront in a financing option, such as a $10\%$ payment on a purchase.

Mile to Metre Conversion

A geometric measurement relationship where $1\text{ mile}$ is exactly equal to $1609.3\text{ m}$.

Pythagorean Relationship

A geometric concept used to determine the exact height or length in building structures, often resulting in square root values like \text{h} = \text{\sqrt{117}}\text{ m}.