After 4 hours of fundraising, the Robotics Club needed $360 more to pay for its equipment. After 7 hours of fundraising, the club needed $120. What is the rate of change for this linear relationship?

Answer 1

#-80#
#80# dollars less to pay after every hour

#(360-120)/(4-7) rarr# Amount left to pay over hours of fundraising

#240/(-3)#

#-80 rarr# This indicates that for every hour of fundraising, #80# dollars less (or #-80# dollars more) needs to be paid for the equipment

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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