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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