What is the slope of the line that passes through points
(1, 2) and (- 1, 3)

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

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:

it is a horizontal line.