1. Find the slope m and an equation of the tangent line to the graph of the function f a the point (2, 38)
f(x)=9x -2x +6
looks like a typo to me
your f(x) = 9x-2x+6
is f(x) = 7x+6
the slope of that would be 7
and the point (2,38) does not satisfy this equation.
check your typing
did you mean
f(x) = 9x^2 ..... ?