Can someone help me solve number 78 please

True or False? In Exercises 77, 78, and 79, determine whether the statement is true or false. If it is false, explain why or give an example that shows it is false. 77. The graph of the parametric equations z = t2 and y = th is the line y = c. Answer True False 78. If y is a function of t and r is a function of t, then y is a function of z. 79. The curve represented by the parametric equations z = t and y = cos t can be written as an equation of the form y = f (x). Answer + True False