y = mx + c (AQA GCSE Maths): Flashcards

Standard form (or slope-intercept form)

The gradient (or slope) of the line

The y-intercept (where line crosses y-axis)

Isolate $y$ on one side of the equation

The coefficient of $x$ (number in front of $x$)

The constant term that stands alone

rac{ ext{change in y}}{ ext{change in x}}

Look where the line crosses the y-axis

m = rac{y_2 - y_1}{x_2 - x_1}

Substitute both original points back into the equation