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On the y-axis: if the graph is moved vertically up by 'n', its affecting the y value by a positive amount, so your (x,y) becomes (x,y+n) and your equation becomes y+n=f(x) rather than y=f...

The form of a linear equation. y=ax+bWhat does it look like on a graph. What is the gradientWhat is the y-intercept.How would you plot it accurately.Examples.

The first thing to be aware of with grouped frequency is that we are not given the exact data, but instead we are told that we have some data and we have been able to divide it into set groups. Imagine we...

x < -3

y+y=2y
x×x=x²
therefore, y+y-x×x=2y-x²