Mathematics · Oct / Nov 2021 · Paper 42 · Question 5
0580
As printed in the paper
The question as text
The table shows some values for y x x 3 3 3 2 = - + . x 1 - .0 5 - 0 0.5 1 1.5 2 2.5 3 y 2.125 3 2.375 1 1 - .0 125 -
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
5(a)[3]
–1, –0.375, 3 [3]
B1 for each
5(b)[4]
Correct graph [4]
B3FT for 8 or 9 correct points or B2FT for 6 or 7 correct points or B1FT for 4 or 5 correct points
5(c)[4]
y = 2 – x ruled correctly AND –0.45 to –0.35 1 2.35 to 2.45 [4]
B2 for y = 2 – x ruled
or B1 for [y = ] 2 – x soi or y = k – x ruled or y = kx + 2 ruled, but not y = 2
B2 for all three values
or B1 for any two values
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