Graph the line that contains this point (-1,-3) and has a slope of 1/3

When trying to find the point-slope equation of a line you need to pick a point and plug it into the plain equation with your slope.

-3 = 1/3(-1) +b

Multiply your slope with your x

-3 = -1/3 +b

Move the -1/3 to the other side by doing the opposite operation, in this case being addition.

-3 +1/3 = b

-2 2/3 = b

y = 1/3x - 2 2/3

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.

what is the original number? you forgot to add it.