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2.1 Graphs of Functions (Part 3)

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(B) Types of graphs of functions.

(c) Cubic function: y = ax3 + bx + c
Highest power of the variable x is 3.

(i) y = ax3 + bx + c, a> 0

(ii) y = ax3 + bx + c, a< 0



(d) Reciprocal function: y = a x  
Highest power of the variable x is –1.