book Maths Puzzle Numerical Ability

Y X
-4 -3
10 4

what is the equation for these points

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book Other Question

2.A reflecting telescope has a parabolic mirror for which the distance from the vertex to the focus is 35feet. if the distance across the top of the mirror is 54 inces, how deep is Determine whether the function F(x) = x^2-4, x<=0 is a one-to-one Function.