Let f(x)=(x+4)^3. What are the gradient and equation of the chord/secant between (2,f(2)) and XXXXXXXXXX,f XXXXXXXXXX))? The gradient m= (input your answer to 3 decimal places). The equation of the...

Let f(x)=(x+4)^3. What are the gradient and equation of the chord/secant between (2,f(2)) and (2+0.005,f(2+0.005))?

The gradient m=     (input your answer to 3 decimal places).

The equation of the chord/secant is y=ax+b where:

a=    and b=

Enter both values a and b correct to 3 decimal places.