Find the value of y so that the points (-2,5) and (8y) lie on a line with the slope -1/5

In triangle opq right angled at p op=7cm, oq-pq=1 determine the values of sinq and cosq

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label

Which representation has a constant of variation of -2.5