## anonymous one year ago 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?

1. anonymous

Time (weeks) Lake Depth (feet) 0 346.0 2 344.8 5 343.0 7 341.8 10 340.0 12 338.8

2. anonymous

@almighty_boi

3. anonymous

@winxclubbloom15

4. anonymous

these are the answer choice 343.0 feet 343.6 feet 344.4 feet 348.4 feet

5. anonymous

Plot that function into y=mx+c form

6. anonymous

x is time and y is lake depth

7. anonymous

yes

8. anonymous

okay

9. anonymous

You know how to do it right?

10. anonymous

no im not sure

11. anonymous

i need help

12. 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)

13. anonymous

You can take any 2 points and find your gradient, m with this formula $m=\frac{ y _{2} - y _{1} }{ x _{2} - x _{1} }$

14. anonymous

okay thanks i got it now

15. anonymous

Yes, after you got the equations right you sub in x=4 and you get the answer.

16. anonymous

yes im srry @crissyyyxoxo123 iwas helpin other ppl