book Maths Puzzle Numerical Ability

WRITE AN EQUATION OF THE LINE THROUGH THE GIVEN POINTS

(-4,-8) , (0,2)

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book Other Question

Subtract the complex numbers and simplify: 3+2i/1+2i-1/1/2i= Help! Thank you. ok I am given the directions-Find the slope of the graph of the linear function f and the problem is....f(2)=-3, f(3)=9

how do i find the slope?