exam Maths Puzzle Numerical Ability

Can you please help me to write an equation for a direct variation with a graph that passes through these points: (9, -1)

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exam Other Question

please help me in this
let f(X) =2x 0 Tutor could you help me please? I didn't know under what category I should have placed this question, I apoligize if I did not place this under to correct area. This is a Punnett