The ages of a father and son add up to 66. The father's age is the son's age reversed. How old could they be? (separate by a com
2 answers:
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Answer:
D. y = 1/2x + 3/2
Explanation:
You probably already know the point slope equation:
y = m(x - x₀) + y₀
All you need is the slope and the (x₀, y₀).
The (x₀, y₀) could be solved by plugging in the given x=-1 value into the function.
m, the slope, is the same as a derivative; ie. a derivative is a slope.
So solve for the derivative and find the slope at x=-1.
Plug into point slope equation and simplify.
