To construct the tangent to a curve at a certain point A, you draw a line that follows the general direction of the curve at that point. An example of this can be seen below. Once the tangent is found ...

Below is the graph of a quadratic function, showing where the function is increasing and decreasing. If we draw in the tangents to the curve, you will notice that if the gradient of the tangent is ...

The international substitution effect provides an explanation for the downward slope of the aggregate demand curve. The textbook explanation relies on fixed exchange rates. With flexible rates, the ...