Question

Which of these functions are linear ?

Answer 1

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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.

• Linear equation have atmost 1 zero. This we can determine through the graph.

• Quadratic equation have atmost 2 zeroes and the no. of times it intersect with x-axis determines the no. of zeroes of the quad. equation.

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Answer 2

E

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!