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9. (10 points) Several expressions and phrases are written below, each one about the same function y = f(z). Circle only those expressions and phrases that agree with this statement; " The line tangent to y = f(x) at the point (3, -4) has slope m = -6." a) f'(-4) --6 (3 + h) +4 b lim h c) (3) =-6 d)- lim f(-4+h)+3 =-6 1=+0 h e lim f(c) +4 =-6 C - 3