The graph models the amount of radioactive element present over the course of a 10-minute experiment. What is the average rate of change of the amount of the element over the 10-minute experiment?

A. -2.0 g/min
B. -1.8 g/min
C. -0.2 g/min
D. -5.0 g/min

What the heck i didn’t know

Ais correct yes but if u want explanation i have it for you if u have to show work

Okay so n is going to represent our first number. since the second number of five times greater than n, the second number will be represented as 5n. for us to figure out the two  numbers we need to have  the value of n first. this is going to be done by adding the two numbers together, n and 5n. it can be simplified as 6n, which the problem states is equal to 72. divide 72 by 6n and you can solve for n.  n+5n=726n=72n=(72/6)n=12  now that we know the value of n, we have to multiply 5 times 12 which equals 60. so our two numbers/integers are 12 and 60