In Exercises

(a) Use a graphing utility to graph the curve represented
by the parametric equations

(b) Use a graphing utility to find
dx/dt, dy/dt, and dy/dx at the given value of the parameter

(c) Find an equation of the tangent line to the curve at the given
value of the parameter

(d) Use a graphing utility to graph
the curve and the tangent line from part (c).

Parametric Equations x = 6t, y = 1 + 4 Parameter t = 1