Date | November 2019 | Marks available | 4 | Reference code | 19N.1.SL.TZ0.S_3 |
Level | Standard Level | Paper | Paper 1 (without calculator) | Time zone | Time zone 0 |
Command term | Describe | Question number | S_3 | Adapted from | N/A |
Question
Let g(x)=x2+bx+11. The point (−1, 8) lies on the graph of g.
Find the value of b.
[3]
a.
The graph of f(x)=x2 is transformed to obtain the graph of g.
Describe this transformation.
[4]
b.
Markscheme
valid attempt to substitute coordinates (M1)
eg g(−1)=8
correct substitution (A1)
eg (−1)2+b(−1)+11=8, 1−b+11=8
b=4 A1 N2
[3 marks]
a.
valid attempt to solve (M1)
eg (x2+4x+4)+7, h=−42, k=g(−2)
correct working A1
eg (x+2)2+7, h=−2, k=7
translation or shift (do not accept move) of vector (−27) (accept left by 2 and up by 7) A1A1 N2
[4 marks]
b.
Examiners report
[N/A]
a.
[N/A]
b.