exam Maths Puzzle Numerical Ability

Graph the solution set to the following system of inequalities: y>=x^2-1
y<=-x+2

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exam Other Question

A company has a fixed cost of $75,000. Variable cost per unit is $25. Revenue unit is 75. Find the following:

a) Break Even Point
b) The profit or loss from producing 900 units. How do you find the slope of the line containing the points (-1, -1/5) and (2/3, 3/4)? I am confused about this because I do not understand how to find the slope when the points contain fractions and/or decimals.