Original post by Happystudy1!
How to work out the equation of a graph
What type of graph is it?
Generally, for linear ones, you can use y = mx + c (where m is the gradient, and c is the y-intercept). Use values of x and y from the graph to work out the gradient (change in y ÷ change in x), and then do some substitution to work out the y-intercept.
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