(a) Complete the table of values for \(y = 2x - 1\)
\(x\)
\(-2\)
\(-1\)
0
1
2
3
\(y\)
\(-1\)
5
(2)
(b) On the grid, draw the graph of \(y = 2x - 1\) for values of \(x\) from –2 to 3(2)
Mark scheme (a)
Scheme
Marks
–5, –3, (–1), 1, 3, (5)
B2
(2)
Notes
B2: for all correct values in the table (B1 for 2 or 3 correct values)
Mark scheme (b)
Scheme
Marks
M1ft
Correct answer scores full marks (unless from obvious incorrect working) Answer: Correct line drawn
A1
(2)
(4 marks)
Notes
M1ft: for at least 5 points plotted correctly (within the circles on the overlay) ft their incorrect table (provided B1 scored in part (a)) or for correct line segment through at least 3 of (−2, −5) (−1, −3) (0, −1) (1, 1) (2, 3) (3, 5) or for a straight line with gradient 2 or for a straight line through (0, –1) with a positive gradient
A1: for a correct line between \(x = -2\) and \(x = 3\) (clear intention to go through all the points and which must be a line – allow freehand) Ignore to the left of \(x = -2\) and to the right of \(x = 3\) (Note: If a fully correct graph is shown, but a blank table is shown in (a), then award 2 marks for (a) and 2 marks for (b))
