Hiw many solutions does this have

What is true about the dilation? it is a reduction with a scale factor between 0 and 1. it is a reduction with a scale factor greater than 1. it is an enlargement with a scale factor between 0 and 1. it is an enlargement with a scale factor greater than 1.

Just tell me how to set up the equation.

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom