question 2\nif the tangent line to y = f(x) at (8, 8) passes through the point (6, -32), find f(8).\no f…

question 2\nif the tangent line to y = f(x) at (8, 8) passes through the point (6, -32), find f(8).\no f (8)=-20\no f (8)=40\no f (8)=45\no f (8)=30\no f (8)=20
Answer
Explanation:
Step1: Recall slope - formula for a line
The slope $m$ of a line passing through two points $(x_1,y_1)$ and $(x_2,y_2)$ is given by $m=\frac{y_2 - y_1}{x_2 - x_1}$.
Step2: Identify the two points
The tangent line to $y = f(x)$ at the point $(8,8)$ passes through $(8,8)$ and $(6,-32)$. Here $x_1 = 8,y_1 = 8,x_2=6,y_2=-32$.
Step3: Calculate the slope
$m=\frac{-32 - 8}{6 - 8}=\frac{-40}{-2}=20$.
Step4: Recall the relationship between the slope of the tangent line and the derivative
The slope of the tangent line to the curve $y = f(x)$ at $x = a$ is equal to $f^{\prime}(a)$. Here $a = 8$, so $f^{\prime}(8)$ is the slope of the tangent line.
Answer:
$f^{\prime}(8)=20$