Question 4948
First write the equation, where r and t are variables and k is a constant to be determined:
r=kt


Plug in the values of r= -4 and t= 2:
r= kt
-4 = k* 2


Divide both sides by 2, and get 
-2 = k


Now substitute that value of k=-2 into the original equation:
r=kt
{{{r= -2t}}}


R^2 at SCC