O-LevelAdditional MathematicsStraight line graphs4037/22 · May/June 2020 · Q58 Marks
Solutions to this question by accurate drawing will not be accepted. The points A and B are (4, 3) and (12, −7) respectively.
- (a)Find the equation of the line L, the perpendicular bisector of the line AB.[4]
- (b)The line parallel to AB which passes through the point (5, 12) intersects L at the point C. Find the coordinates of C.[4]
Mark scheme
Marking points from the official mark scheme (May/June 2020). The mark or mark type is shown in brackets.
- [1] (a) Finds coordinates of mid-point (8,-2)
- [1] (a) m_AB = (3-(-7))/(4-12) = 10/-8 = -5/4 oe soi
- [1] (a) m_L = -1/(-5/4) = 4/5 oe
- [1] (a) y+2=(4/5)(x-8) oe isw
- [1] (b) y-12=-(5/4)(x-5)
- [1] (b) Attempts to solve their equations
- [2] (b) (13, 2)
Write your answer and get it marked
On Oracle Prep you can write or photograph your own answer and have it marked by AI against this mark scheme, with feedback on what you missed.
Sign up free →