Question

Help me on this please

Answer 1

Writing an linear equation from a given scenario

Answer:

Choice B

Step-by-step explanation:

Please refer to my answer from this question to know more about writing a linear equation from a given scenario: brainly.com/question/24599307

Scenario: A submarine dives $70$ feet per minute.

We let $f$, be the position of the submarine from sea level as a function of $t$, the time (in minutes) since the submarine dived.

The given scenario states that for every minute, the position of the submarine decreases (because the submarine is going in a downward direction) by $70$ feet. So $f(t)$ can be defined as $-70t$.

Now we can select two points for the graph. We can select points $(1, f(1))$ and $(2, f(2))$.

Evaluation of function:

$f(1) = -70(1) \\ f(1) = -70$

$f(2) = -70(2) \\ f(2) = -140$

Our points are $(1, -70)$ and $(2, -140)$

Choice A doesn't touch our chosen points. In Choice C, it would be the case if the submarine is going in upward direct.

So the correct graph is Choice B.