Question 1150885
 the rate of change is a slope

recall: slope-intercept form of linear equation

{{{y=mx+b}}} where {{{m}}} is a slope and {{{b}}} is y-intercept

compare {{{y=mx+b}}} to {{{y = -4x}}} and you will see that the rate of change for the relation  is {{{m=-4}}}

so, answer is:

a. {{{-4}}}