MCQOPTIONS
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				| 1. | 
                                    Which_one_of_the_following_is_not_a_ramp_function? | 
                            
| A. | r(t) = t when t ‚â• 0 | 
| B. | r(t) = 0 when t < 0 | 
| C. | r(t) = ‚à´u(t)dt when t < 0 | 
| D. | r(t) = <sup>du(t)</sup>‚ÅÑ<sub>dt</sub> | 
| Answer» E. | |