Could someone please answer number 28, letter D.

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)

How can i differentiate this equation?