Question

https://gyazo.com/a251f622d0fbd64329699bf2a793f85c

Answer 1

when x = 0 f(x) = 4

so we can write f(x) = 4 a^0 = 4

now reading off the gragh when x = 1 f(x) = 7 so

7 = 4 a^1

so a = 7/4 or 1.75
so our function will be

f(x) = 4(1.75)^x

Answer 2

thanks!