Completely factor the polynomial. 16x 2 - 25

Hello people, i have a math question that i need with, me, i will give the correct one brainiest, and for the other correct people, a and 5 stars.

How do you determine whether a relationship represented as as graph is linear or nonlinear

In july, the average temperature in one us city was 29°c. by december, the average temperature had fallen by 29°c. explain why the average temperature in december was 0°c.