Use linear approximation to approximate 49.2√ as follows. Let f(x) = √x. The equation of the tangent line to f(x) at x = 49 can be written in the form y = mx + b. Compute m and b.

a) m = 1/14, b = 47/14
b) m = 1/14, b = 51/14
c) m = 1/7, b = 47/14
d) m = 1/7, b = 51/14