exam Maths Puzzle Numerical Ability

what would -1/4 look like on a graph

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exam Other Question

The volume V as a mass of gas varies directly as the temperature T and inversly as the pressure P. If V=242.0 inch cube when T= 220 degrees and P = 10 pounds square, what is the volume when T = 190 degrees and P = 20 pounds per inch square? Solve the formula for the specific variable
P = 2L+2W for L