What is the standard gorm of the equation y=-2x+1?

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula c= r/1.8 - 273, what is the temperature in celcius corresponding to r degrees rankine.

Classify the following triangle check all that apply

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9