Q$9$: Define $y1(t)$ in term of $x(t).$

A$)y1(t)=x(0\mathrm{.}5t)$

B$)y1(t)=x(1\mathrm{.}5t)$

C$)y1(t)=0\mathrm{.}5x(t)$

D$)y1(t)=x(2t)$

Q$10$: Define $y(t)$ in term of $x(t).$

A$)y(t)=x(-2t-1)$

B$)y(t)=x(-2t+1)$

C$)y(t)=x(-0\mathrm{.}5t-1)$

D$)y(t)=x(-0\mathrm{.}5t+1)$

Q$11$: Define $y(t)$ in term of $x(t).$

A$)y(t)=x(t+1)$

B$)y(t)=1+x(t)$

C$)y(t)=x(t)-1$

D$)y(t)=1-x(t)$

Q$12$: Define $y(t)$ in term of $x(t).$

A$)y(t)=2x(t)+1$

B$)y(t)=x(-2t)+1$

C$)y(t)=-2x(t)+2$

D$)y(t)=-2x(t)+1$