The curve is defined using the pair of parametric equation shown above for all real values of .
What is the area bounded by the curve and the coordinate axes?
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Since t is a real number, t 2 will be always be non-negative. The minimum value of y is − 1 and the minimum value of x is − 2 .
We can subtract the given equations to get y − x = 1 . It's graph looks like this
It is not a complete line since x cannot be less than − 2 and y cannot be less than − 1 . It is, in fact, a ray starting at the point (-2, -1).
Its intercepts are ( − 1 , 0 ) and ( 0 , 1 ) . These two points along with the origin form a right triangle. The lengths of the legs of the right triangle are both 1. Therefore the area of the triangle is 2 1 × 1 × 1 = 0 . 5 □