When constructing parallel lines, how can you verify the lines constructed are parallel? Check the intersecting lines with the c
orner of a piece of paper to ensure the lines create 90° angles. Check the distance along the lines at several places with a compass to ensure they are the same length. Check the distance between the lines at several places with a compass to ensure they are equidistant. Check the angles used in the construction with a straightedge to ensure consistency.
So since x=5 and y= 1 the new expression would be 1(5-7) to the second power. Using pemdas, 5-7 is -2. -2 to the second power is -4. negative 4 times 1 is negative 4.
Watch that , for option 1 , 3 and 4 there is two values of Y for same X . That is not possible at all. Because How can a function gives you two different output as for same input ? So it is very Clear that Option 2 is a function and the other are not function. I have marked Which are function and which are not.
