book Maths Puzzle Numerical Ability

The orchestra's greatest expense is travel costs. Which sector is it?_____
Title the correct sector on thr graph.

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book Other Question

A general equation of the family of lines perpendicular to 2x-5y=7 is...

THE ANSWER IS: 5x+2y=k (BUT HOW DO U GET THIS?) please tell me how and why this is the answer

YOUR HELP IS MOST APPRECIATED, THANK YOU SO MUCH
passes through (-4,-2) parrallell to -7x-5y=58