exam Maths Puzzle Numerical Ability

Can someone please help? I need to see what the following graphs look like
indiviually. I need to have a sketch of them individual.
1. y=(2/3)x-4

2. 8x-3y=24

3. Slope= -3/4&b=6
Thanks, a lot

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exam Other Question

Anna has 6 liters of 60% acid. How much water should she add to make a solution that is 40% acid? 24.948/6.6