Question

A transformation maps a onto b and c onto d name the image of a name the preimage of b name the image of c name the preimage of d

Answer 1

If a transformation maps $a \mapsto b$, then $b$ is the image of $a$, and $a$ is the preimage of $b$. So,

• the image of $a$ is $b$
• the preimage of $b$ is $a$
• the image of $c$ is $d$
• the preimage of $d$ is $c$