Question

plz answer thhis quesstion​

Answer 1

Answer:

Ans - option 2

Step-by-step explanation:

$y = a {e}^{ - x} \\from \: graph \: when \: x = 0 \: y = 4 \\ so \: 4 = a {e}^{ - 0} \\ ( {e}^{0} = 1) \\ 4 = a$