book Maths Puzzle Numerical Ability

Please help me find the equation of the line through (-3,7) that is paralled to the line joining the points (4,5) and (-2, -8). Thank you in advance.

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Wes is mixing peanuts and chocolate pieces. Peanuts sell for $4.50 a pound and the chocolate sells for $6.50 a pound. How many pounds of chocolate mixes with 5 pounds of peanuts to what is the slope of y=-2x+3