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Gcse maths question on lines

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Original post by daniella_r
The y intercept but then usually that means that the entire answer went wrong somewhere.


Two things:

- don't post full solutions
- don't post answers you believe to be wrong

As it happens your answer is correct (I'd prefer to see fractions than recurring decimals though).
When you have the coordinates of A and D, or the coordinates of D and the gradient of AD, you can find the equation.

Co-ords of A and D:
change in y / change in x = gradient
y - (y1) = m (x-(x1))

Co-ords of D and gradient AD:
Use the gradient to find where it will cross the y-axis, then sub into y=mx+c with c as the y-intercept
Original post by Mr M
Two things:

- don't post full solutions
- don't post answers you believe to be wrong

As it happens your answer is correct (I'd prefer to see fractions than recurring decimals though).


Ok thankyou, I'll know for the future, it's deleted. I don't know who saw it though.
Original post by daniella_r
Ok thankyou, I'll know for the future, it's deleted. I don't know who saw it though.


No problem.

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