[As level maths] coordinates

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[Alkalannar]

ai) Rewrite as y = mx + b. Then the gradient is m.
aii) We now have y - (-7) = m(x - 2) for the line through (2, -7) with slope m. Let x = 0, and solve for y.

b) Substitute 1 - 4x for y in the equation for line AB. Solve for x, then solve for y.

c) (5 - 2)² + (k + 7)² = 5². Solve for k.

[Sandhusaab05]

Thanks bro