This is driving me crazy!

What is the area of the region bounded by the coordinate axes and the line tangent to the graph of at the point (0,1)?

I differentiated y to get a slope of 1/4. Used the equation of a line and the given point to get the equation of the tangent line: . The line forms a triangle, intersecting the y-axis at y=1 and intersecting the x-axis at x=-4. So, base of length 4, height of length one, the area is half of 4 times 1, which is 2. The given answer is 1.

Am I missed something?