Hello

I am wondering how i establish where to draw this line?

Question

22

The grid opposite shows the graph of *y *= *x*2 + 3*x *– 2

(a) By drawing an appropriate straight line on the graph solve the equation

x

2 + 3*x *– 3 = 0

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Answer .................................................. ........................ *(2 marks)*

(b) By drawing an appropriate straight line on the graph solve the equation

*x*2 + 2*x *– 1 = 0

graph can be seen on page 22 here:

http://store.aqa.org.uk/qual/gcse/qp...W-QP-JUN05.PDF