Sample+Solution

**Sample Solution To Finding the Equation of a Line Tangent to a Parabola and Passing through (x,y)**
Find the equation(s) of the lines that are tangent to the parabola  and pass through the point (2, 4). The solution(s) to this quadratic must be such that the line is tangent to the curve hence the discriminant must equal 0.



Therefore, there are two tangent lines:



And the final graph: