Answer:
(2 decimal places)
Step-by-step explanation:
Quadratic Formula: 
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Plug in values:

First value of x:
(2 decimal places)
Second value of x:
(2 decimal places)
Answer:
point
Step-by-step explanation:
The given equation is,

It can be rewritten in the form of y=mx+c, where c is the y intercept.
Hence,

Put different values for x and find value of y.
When x=0, y=1.
When x=1,

The graph is,
The age would increase by 15 years that is, x+15