book Maths Puzzle Numerical Ability

Please help me. Graph the function f(x)=2x - 1 for values of x where -1≤ x ≤4 (show all working)

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book Other Question

I cant figure out how to solve this equation. 2(2x+9)=-16 Can you please help me? apply the quadratic formula to find the roots of the given function, and then graph the function.

g(x) = x^2 + x + 12