book Maths Puzzle Numerical Ability

how do i graph these equations on paperby plotting points and connecting the points to make a line

1. y= -x
2. y= x-1
3. y= -x+2
4. y= 2x+1

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book Other Question

12x2+4x-10 i need help factoring trinomials with a coefficient of x2 greater than 1 for example 3x2(square)+10x+8