Question

The expression -370+17m represents a submarine that began at a depth of 370 feet below sea level and ascended at a rate of 17 feet per minute. What was the depth of the submarine after 8 minutes?

Answer 1

Rearrange the linear equation to y=Mx+b
So, y = 17m - 370

We know that it goes 17 feet up every min.

Asking for depth after 8 mins. So, plug in 8 for m.

We get: y= 17(8)-370. So, y= - 234.

Therefore, the submarine is 234 feet under the water after 8 mins.

Hope that answers your question :)