Question

or
Function A and Function B are linear functions.
Function A
x y
–
5
–
9
–
3
–
5
3 7
Function B
y=3x–3
Which statement is true?

Answer 1

From the table, Function A has points (−5,−9), (−3,−5), (3,7). Slope = (−5 − (−9))/(−3 − (−5)) = 4/2 = 2, and using (3,7) gives y = 2x + 1. Function B is y = 3x − 3 (slope 3).

Since the slopes are 2 and 3, the lines are neither parallel nor perpendicular. (They intersect at x = 4, y = 9.)