Which of these functions are linear ?

Answer:
E
Step-by-step explanation:
A function that is linear is a straight line. A linear function can be found using [ y = mx + b ]
F shows an example of a quadratic function. A quadratic function can be found using [ f(x) = ax² + bx + c ]
Best of Luck!
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The answer is E because the graph of linear equation is a straight line whereas the graph of a quadratic equation is a parabola opening upwards or downwards depends upon the coefficient of a in standard form : ax² + bx + c.
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