exam Maths Puzzle Numerical Ability

indentify the symmetry (x-axis, y-axis, orgin, or none) that the equation exhibits.
a)y=x^2-6
B)x^3=y^2
C)y=x

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exam Other Question

help I need to find the slope for the passes through here is the equation

m=3(1,^2)

this is what I have done but come up with the wrong answer
y=mx+b
y=3x+b
^2=3x(1)+b
than I am just lost
Solve 2(x-1)^2 = -16 over the set of complex numbers.