Asked by Jacob

The surface of the Grand Lake is at an elevation of 648 feet. During the current drought, the water level is dropping at a rate of 3 inches per day. If this trend continues, write an equation that gives the elevation in feet of the surface of Grand Lake after x days.

I am confused.

I came up with y=3x + 648

Is this right?
Answered by Stephen Curry
new height = original elevation - ((drop per day/12) * number of days)

(we divide by 12 to get the result in feet)

new height = 648 feet - ((3 inches per day/12) * number of days)
Answered by Stephen Curry
did you get it?
Answered by Jacob
Yes I got it now. Thanks so much for the help.
Answered by Reiny
y = (-1/4)x + 648
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