Which equations represent a linear function?

Equation 1 y=5x-2
Equation 2 y=-1/3x
Equation 3 y=x^2-3
Equation 4 y=1

1 answer

linear functions graph as a straight line,
the only one which is not a straight line is
y = x^2 - 3

the x^2 term was a give-away
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