exam Maths Puzzle Numerical Ability

Please help me with this question.

X 1 3 6
Y 3 9 t

The table above shows a relation of the form y = kx` + c where k and c are constants.

calculate the value of t.

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exam Other Question

The batteries used in a digital watch have an operating life that is normally distributed. As sample of 16 batteries reveals a mean of 3.45 years and a standard deviation of 0.3 y Which does not represent a possible intersection of a line and a triangle?:
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