Edexcel – foundation
\( \text{On the grid, draw the graph of } y = 4x - 1 \text{ for values of } x \text{ from } -2 \text{ to } 2. \)
\begin{aligned} &\text{Use } y=4x-1 \text{ and substitute } x=-2,-1,0,1,2:\\ &x=-2:\; y=4(-2)-1=-8-1=-9 \\ &x=-1:\; y=4(-1)-1=-4-1=-5 \\ &x=0:\; y=4(0)-1=-1 \\ &x=1:\; y=4(1)-1=4-1=3 \\ &x=2:\; y=4(2)-1=8-1=7 \end{aligned} \\ \begin{array}{c|ccccc} x & -2 & -1 & 0 & 1 & 2 \\ \hline y & -9 & -5 & -1 & 3 & 7 \end{array}
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