A linear function plot is shown below. The plot represents a function of the form Y = mX + b where m represents the slope of the plot line and b represents the intercept. Determine m and b from the plot. If X = –3.5, calculate the value of Y and enter it in the box with one digit to the right of the decimal point.

-10 is the answer :)

Place the compass at one end of the line segment. Set it to slightly longer than half of the line length. Draw arcs above and below the line. Place at the other end of the segment, without changing the width. Draw arcs that intersect the previous ones. The two points created form a perpendicular bisector of the line.