Asked by Mr Homie
                Match the parametric curve to its description. Be careful: It is possible that the same description fits more than one parametric curve! 
(a) (t + 1,4t−2)
(b) (t^2,3t^2)
(c) (cost,2(cost)^2 + cost)
(d) ((2t + 1)sint,(2t + 1)cost)
(e) (2t−1,5)
(1) A portion of a parabola.
(2) A straight line traversed at constant speed.
(3) A straight line traversed at variable speed.
(4) A circle.
(5) Doesn’t match any other description.
The parametric curve that I know the description is only (c) which is a (1) parabola. So how about the others?
            
        (a) (t + 1,4t−2)
(b) (t^2,3t^2)
(c) (cost,2(cost)^2 + cost)
(d) ((2t + 1)sint,(2t + 1)cost)
(e) (2t−1,5)
(1) A portion of a parabola.
(2) A straight line traversed at constant speed.
(3) A straight line traversed at variable speed.
(4) A circle.
(5) Doesn’t match any other description.
The parametric curve that I know the description is only (c) which is a (1) parabola. So how about the others?
Answers
                    Answered by
            Steve
            
    visit wolframalpha.com and type in your functions, as in (d) below
http://www.wolframalpha.com/input/?i=parametric+plot+x%3D%282t+%2B+1%29sint,+y%3D%282t+%2B+1%29cost
    
http://www.wolframalpha.com/input/?i=parametric+plot+x%3D%282t+%2B+1%29sint,+y%3D%282t+%2B+1%29cost
                    Answered by
            Mr Homie
            
    So this means that (d) doesnt match any other description? because that's not a circle right? 
What does (2) and (3) should look like in the graph?
    
What does (2) and (3) should look like in the graph?
                    Answered by
            Mr Homie
            
    What does (2)straight line traversed at constant speed and (3) A straight line traversed at variable speed should look like in the graph?
    
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