Paper towels come in two packages. The first package has a single roll of paper towels that has 150 sheets on the roll and costs $1.80. The second package contains three rolls, each of which
has 80 sheets on a roll and costs $2.50. Determine the cost per sheet for each and which is the
better buy

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

no because after the troops were pulled many blacks were killed by hangings lynchings and other cruel ways which in a way interrupted the reconstruction of the south and differed from the way abraham lincoln had an idea of reconstruction