Pls help extra points and mark brainlist

Short answer 8x1

Because 2x4=8
And 8x1=8
So they are equivalent

20 weeks.

Bar graph: Start with zero, and the next ones (bars) will all increase by a 15 interval over the period of 20 weeks. So 1 bar per week, and there are 20 weeks, with each bar having a 15$ profit difference. Sorry, can't draw it here.

equation: 15x=300
                15/(15x=300)/15
                 x=20