After how many missing assignments will a student likely have a zero for an average? (Remember to draw your line of best fit)

After 7 assignments and for the line of best fit you want to draw a line where half of the dots are on ether side of the of the line but it also has to fallow the flow of the dots.

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: