Functions (mathematics)/Graphs/Linear function

Linear function

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Graphs

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f(x) = x

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Let f(x)=y . Then the value of y for all x are

x: -3 -2 -1 0 1 2 3
y: -3 -2 -1 0 1 2 3
Plot these x,y gives a graph of a straight line which has positive slope of 1 that pass through origin at (0,0)

f(x) = -x

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Let f(x)=y . Then the value of y for all x are

x: -3 -2 -1 0 1 2 3
y: 3 2 1 0 1 2 3


Plot these x,y gives a graph of a straight line which has negative slope of 1 that pass through origin at (0,0)