Given four functions, which one will have the highest y-intercept?

f(x)g(x)h(x)j(x)
blake is tracking his
savings account with
an interest rate of 5%
and a original deposit
of $6.
xg(x)
16
28
312
the function h of x equals 4 to the x power, plus 3j(x) = 10(2)x

Here are the four functions :
1) Blake is tracking his savings account with an interest rate of 5% and a original deposit of $6.
Equation : y = 0.05x + 6
y-intercept = (0,6)

2) x           g(x)
    1            6
    2            8
    3           12
 y-intercept = (0,5)

3) The function h of x equals 4 to the x power, plus 3
    equation : y = 4^x + 3
y-intercept = (0,4)

4) j(x) = 10(2)x
y-intercept = (0,1)

Best choice : f(x) has the highest y-intercept.