Question
A class is to eliminate t from the parametric equations x = t^2 + 3 and y = 4t. Beth says that she can write t = sqrt (x-3) to eliminate the parameter. Why is this wrong?
A) She should have added 3 to x, not subtracted
B) She should always solve for t as a function of y
C) She should have taken both the positive and negative square root
D) She should first substitute y for t before solving
A) She should have added 3 to x, not subtracted
B) She should always solve for t as a function of y
C) She should have taken both the positive and negative square root
D) She should first substitute y for t before solving
Answers
Steve
looks like B to me