In reply to @El_Timbre
@El_Timbre that's great, thanks!
In reply to @christianp
@El_Timbre You might know this: has (y-y1) = m(x-x1) replaced y=mx+c in the national curriculum? If so, when did that happen?
In reply to @El_Timbre
@El_Timbre that's great, thanks!
In reply to @christianp
@El_Timbre You might know this: has (y-y1) = m(x-x1) replaced y=mx+c in the national curriculum? If so, when did that happen?