Having trouble with part c. wondering how to get the right answer

Question

Ciara walks from her house to a bus stop that is 320 yards away.

If Ciara is 14 yards from her house, how far is she from the bus stop?

If Ciara is 178.2 yards from her house, how far is she from the bus stop?

Let the variable  represent Ciara's varying distance from her house (in yards). As Ciara walks from her house to the bus stop, the value of  varies from

Answer 1

Draw a picture (even if it is not to scale).

Ciara walks from her house to a bus stop that is 320 yards away.

If Ciara is 14 yards from her house, how far is she from the bus stop? (320 - 14) = 306 yards

If Ciara is 178.2 yards from her house, how far is she from the bus stop? (320 - 178.2) = 141.8 yards

Let the variable x represent Ciara's varying distance from her house (in yards). As Ciara walks from her house to the bus stop, the value of x varies from 0 yards to 320 yards

[Note: the last question uses x for "how far from her house," not like the other questions that asked, "How far is she from the bus stop?"