18+36=54
i tried to do all of these and none of them add up to 54
That bracket symbol, with an r in it, means "the absolute value of r".
So r's absolute value is -2 meaning r is two units from zero
r= 2
So.. take a peek at the picture... let's get two points from it, hmm say 0,4 notice it touches the y-axis there, and say hmmm -4, 1, almost at the bottom of the line


once you get the slope and solve for "y", that'd be the equation of the line.
2.3 + 6.82 : 3.74 + 1.09 = 3.39 + 1.8 = 5.19