## Answer :

[tex]x-weeks\\y-total\ money\\2x-saving\ every\ week\\\\\boxed{y=2x+20}[/tex]

so

y= money saved so

so each week times 2 +20 =total because

you started with 20 then

x weeks times 2 gives you how much you earned so

y=2x+20

slope=2

(slope intercept form=y=mx+b where m=slope)