2.1.2 Types of Graphs of Functions.


(B) Types of graphs of functions.
 
(a) Linear function: y = mx + c
Highest power of the variable x is 1.

(i
y = mx + c, m > 0


(ii
) y = mx + c, m < 0




(b) Quadratic function: y = ax2 + bx + c
Highest power of the variable x is 2.

(i
y= ax2 + bx + c, a > 0


(ii
) y= ax2 + bx + c, a < 0




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

(i
) = ax3 + bx + c, a> 0

(ii
) = ax3 + bx + c, a< 0


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



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