exam Maths Puzzle Numerical Ability

Find the inverse of the relation {(4,2),(-1,5),(2,3)} Please!

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exam Other Question

Find a quadratic equation that fits the data.

x 1982 1984 1986 1988 1990
y 1586 10927 41190 90000 106000 Find the equation for the asymtopes of the hyperbola x^2/9 - y^2/81 = 1