Cambridge Chapter 2 Review

Distances and Midpoints (RECAP)

The distance and midpoint between point A (x1, y1) and point B (x2, y2) can be found as: Distance: $A B = (y_{2} - y_{1})^{2} + (x_{2} - x_{1})^{2}$ Midpoint: $M_{A B} = (\frac{x _{1} + x _{2}}{2}, \frac{y _{1} + y _{2}}{2})$
a linear relationship relates two variables two each other and produces a straight line graph.
some key features of a linear relationship are: Gradient (slope) (through (x1, y1) and (x2, y2)) $m = \frac{r i se}{r u n} = \frac{y _{2} - y _{1}}{x _{2} - x _{1}}$ Angle of inclination (Anti clockwise from +ve x-direction) $m = tan θ, 0° \leq θ < 180°$
y-cintercept (0, c) subsitute x=0 to find c
x-intercept (a, 0) subsitute y=0 to find a

🌸 JACARANDA