Can someone help me please!! ASAP

What term best describes a line ans a point that lie in the same plane

Which of the following transformations will make coincide with ? a. counter-clockwise rotation 90º about a, followed by a translation 5 units to the right b. translation 5 units to the right, followed by a reflection across the y-axis c. translation 5 units to the right, followed by a reflection across the x-axis d. translation 1 unit up and 5 units to the right, followed by a reflection across the x-axis

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?