Anyone know this ?? :( need help

It is the value of the coin when it was originally purchased. t=0  y=3

Step-by-step explanation:

The y intercept is the value when t=0

It is the value of the coin when it was originally purchased.  y=3

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2