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.

Question

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?

Stephen Curry · Accepted Answer

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)

Stephen Curry · Answer

did you get it?

Jacob · Answer

Yes I got it now. Thanks so much for the help.

Reiny · Answer

y = (-1/4)x + 648