anonymous
  • anonymous
An environmental agency studying the effects of drought on a lake found that the water level decreased at a constant rate during the first few months of the drought. When the agency began its research, the depth of the lake was 346 feet. The table represents the agency’s susequent observations about the lake's depth. what was the depth after 4 weeks?
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Time (weeks) Lake Depth (feet) 0 346.0 2 344.8 5 343.0 7 341.8 10 340.0 12 338.8
anonymous
  • anonymous
anonymous
  • anonymous

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anonymous
  • anonymous
these are the answer choice 343.0 feet 343.6 feet 344.4 feet 348.4 feet
anonymous
  • anonymous
Plot that function into y=mx+c form
anonymous
  • anonymous
x is time and y is lake depth
anonymous
  • anonymous
yes
anonymous
  • anonymous
okay
anonymous
  • anonymous
You know how to do it right?
anonymous
  • anonymous
no im not sure
anonymous
  • anonymous
i need help
anonymous
  • anonymous
ok, from the table, you can see the points of the line is (0,346.0) , (2,344.8) , (5,343.0) , (7,341.8) (10,340.0) , (12,338.8)
anonymous
  • anonymous
You can take any 2 points and find your gradient, m with this formula \[m=\frac{ y _{2} - y _{1} }{ x _{2} - x _{1} }\]
anonymous
  • anonymous
okay thanks i got it now
anonymous
  • anonymous
Yes, after you got the equations right you sub in x=4 and you get the answer.
anonymous
  • anonymous
yes im srry @crissyyyxoxo123 iwas helpin other ppl

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