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四星黃金會員
2013-3-3 16:44#1
a car rental company charges a fixed amount per day plus an amount per kilometers travelled for renting a car. Peter paid $80 for driving the car for 100kilometers on one day. He paid $100 for driving the same car for 150kilometers on another day. Find the function of the rental charger f(x) , where x is the distance travelled. -
版主
2013-3-8 12:11#2
$=40D+0.4x
D=day x=distance(1/kilometer)
MAYBE:)