SOLUTION: The rate of change represents the gas mileage in miles per gallon. Between which two measurements was the gas's mileage least? Miles Driven 0 60 150 170 230 260 Gas Us

Algebra ->  Linear-equations -> SOLUTION: The rate of change represents the gas mileage in miles per gallon. Between which two measurements was the gas's mileage least? Miles Driven 0 60 150 170 230 260 Gas Us      Log On


   

Question 936616: The rate of change represents the gas mileage in miles per gallon. Between which two measurements was the gas's mileage least?
Miles Driven 0 60 150 170 230 260
Gas Used(gal) 0 2 5 6 9 11
Answer by MathLover1(20849) About Me  (Show Source):
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The rate of change represents the gas mileage in miles per gallon. Between which two measurements was the gas's mileage least?

Miles Driven .....|0 |60| 150| 170|+230|+260|
Gas Used(gal) ...|0+..|2|....+5|....+6|.... 9| ....11|
-------------------------------------------------------
rate of change:
%28150-60%29%2F%285-2%29=90%2F3=30
%28170-150%29%2F%286-5%29=20%2F1=20
%28230-170%29%2F%289-6%29=60%2F3=20
%28260-230%29%2F%2811-9%29=30%2F2=15
so, we have
Miles Driven .....|0 |60| 150| 170|+230|+260|
Gas Used(gal) ...|0+..|2|....+5|....+6|.... 9| ....11|
-------------------------------------------------------
------------------------30| 30|....20|....20|....15|
Between 9 and 11 the gas's mileage was least.