exam Maths Puzzle Numerical Ability

how do you do frequency tables

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What is the slope of the line with the equation 2x+3y+6=0?

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R=-0.075t + 3.85 can be used to predict the world record in the 1500-m run t years after 1930. Determine (in terms of an inequality) those years for which the world record will be less than 3.5 minutes.