Linear Relationships (HSC SSCE Mathematics Standard): Flashcards

Math representation of real-world using straight-line equation

$y = mx + b$

Gradient (rate of change)

$y$-intercept (starting value when $x = 0$)

$m = \frac{y_2 - y_1}{x_2 - x_1}$ or Rise over Run

Independent variable (value we know or choose)

Dependent variable (value we calculate)

Rate of change, cost per item, speed, or rate of flow

Base fee, initial amount, or starting value

Calculate gradient using two points, identify intercept