Answer:
Option (4)
Step-by-step explanation:
From the table attached,
Ratio of spores in day 2 and day 1 =
= 2
Ratio of spores in day 3 and day 2 =
= 2
There is a common ratio of 2 in each successive to the previous term of the Mold spores.
Therefore, spores are growing exponentially.
Let the function representing exponential function is,
y = a(b)ˣ
Here, y = Number of spores after time 'x'
x = Number of days
a and b are the constants.
On day 1,
x = 1
y = 200
By substituting these values in the exponential function,
200 = a(b)¹
ab = 200 -------(1)
On day 2,
x = 2
y = 400
400 = a(b)² -------(2)
Divide equation 2 by equation 1,
b = 2
By substituting the value of b in equation (1),
a(2) = 200
a = 100
Therefore, equation of the function will be,
y = 100(2)ˣ
Option (4) will be the answer.