Which expression is equivalent to 10 n plus 81 minus 4 n minus 9 ?

answer: 1.5

step-by-step explana

so part 1: the y values stay the same, but the x values are opposite signs.

part 2 & 3: the line will be of equal lengths and will be straight.

part 4: you'd see the same characteristic because the x coordinate becomes a negative making them at equal distances from the y axis?