exam Maths Puzzle Numerical Ability

Graph the following linear equation:

y=-2x-1


Any help with this one would be great. Thank you so much.

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exam Other Question

A fishing boat traveled 3 hours against a 6 km/hr current. The return trip took only 2 hours. Find the speed of the boat in still water. on this problem i had troubles and wasnt sure what to do can someone fill me in?? write in the simplest form without negative exponents. it is
(2/(over) 3)^-2 (4/(over)5)^-1