Linear

To plot a graph

Line, arrows, label with rule

Graph using gradient and y-int

Plot y-int, from that point do rise/run using gradient, always run right, positive gradient go up negative gradient go down

Gradient with two points formula

y₂-y₁/x₂-x₁

Finding gradient of a graph

Start at left point, positive up negative down

Gradient of a horizontal line

0

Gradient of a vertical line

undefined

Given the gradient and one other point on the line

Substitute the gradient into gradient intercept form, Substitute the x and y values from the coordinate to solve for c

Finding the equation of a line from two points

Find the gradient of the line using the two point gradient formula, substitute in the gradient and one set of points into y = mx+c, solve for c

Midpoint formula

x1+x2/2, y1+y2/2