Which table shows
a proportional relationship between x and y?

Table 2

Step-by-step explanation:

Table 2 shows a proportional relationship between x and y.

The values are in direct proportion.

The condition for values and is:

Clearly,

Hence, all the values are in the same proportion, the second table shows the proportional relationship between x and y.

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source:  

false

inverse variation is not exponential