If slope $=2$ for a line on a graph with x on the horizontal axis and y on the vertical axis, then if

Select one:

a$.$

x decreases by $4,$ y decreases by $8$

b$.$

x $=-4,$ then y $=-2$

c$.$

y decreases by $4,$ x decreases by $8$

d$.$

x $=-4,$ y $=-8$

e$.$

x increases by $4,$ y decreases by $8$