A class is trying to eliminate t from the parametric equations x=t^2+4 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.
B. She should always solve for t as a function of y.
Beth's equation t=sqrt(x-3) does not eliminate the parameter t from the parametric equations. To eliminate t, she should solve for t as a function of y, not x.