Question

The amount of time it takes Joel to check e-mail is directly proportional to the number of messages he has. If it takes him t minutes when there are n new e-mail messages, then how long does it take him (in terms of t and n) if there are 50 new messages?

A) 50tn
B) 50n t
C) 50t n
D) t n

Answer 1

50t/n minutes.

Explanation:

The equation of proportionality is t = kn where k is a constant.

So k = t/n.

So for 50 new message the time = 50k = 50 * t/n

= 50t/n minutes.