Question

The table represents the change in the boiling point of water at different altitudes.

Altitude
(in thousands of feet) Boiling Point of Water
(Fahrenheit)
(sea level) 0 212
0.5 211.1
1.0 210
2.0 208.4
2.5 207.5
3.0 206.6
4.0 204.8
4.5 203.9
Determine the dependent and independent variables if this data were plotted. What would the slope of the graph represent?

Answer 1

Do you know how to find the slope of a line?

Answer 2

it's Rise over run

Answer 3

yes

Answer 4

so how do I apply that to this problem

Answer 5

well pick out 2 consecutive readings
- say 4 , 204.8 and 4.5, 203.9

slope will be (203.9 - 204.8) / (4.5 - 2.0)

Answer 6

ok

Answer 7

so would it be
For every increase of 1,000 feet in altitude, the boiling point of water decreases by 1.8 degrees Fahrenheit.

Answer 8

yes - but second thoughts that might not be a very good estimate
better to do the calculation over a bigger range

best would be (203.9 - 211.1) / (4.5 - 0.5)

Answer 9

- that still gives -1.8 lol

Answer 10

ok well the answer choices are
A.For every increase of 1,000 feet in altitude, the boiling point of water increases by 1.8 degrees Fahrenheit.
B.For every increase of 1,000 feet in altitude, the boiling point of water decreases by 1.8 degrees Fahrenheit.
C.For every decrease of 1,000 feet in altitude, the boiling point of water decreases by 1.8 degrees Fahrenheit.
D.For every increase of 1,800 feet in altitude, the boiling point of water decreases by 1 degree Fahrenheit.
E.For every decrease of 1,800 feet in altitude, the boiling point of water decreases by 1 degree Fahrenheit.
and I thought that that was the best answer

Answer 11

yea that's B right

Answer 12

ok thank u :D

Answer 13

yw

Answer 14

do you know which are the dependent and indep[endent variables?

Answer 15

Altitude is the independent and Fahrenheit is the dependent

Answer 16

right

Answer 17

thx

Answer 18

yw