Which equation doesn’t belong with the others: y=4x, y=x + 7, y=-2x+4 & y=3x-1

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

The value √10 and √15 are plotted on the number line

Anormally distributed data set has a mean of 176.3 and a standard deviation of 4.2. what is the approximate z-score for the data value of 167.9? 2.00 −2.00 8.4 −8.4