Problema Solution
Eric sells shirts. It costs him $100 to buy all the shirts and $10 to print designs on the shirts. Eric sells each shirt for $4. So far Eric has sold 20 shirts. Eric uses an equation to calculate his total profit. Write an equation for this situation and determine the slope
Answer provided by our tutors
Eric invested $100 + $10 = $110 in buying and making the shirts.
By selling 20 shirts he earns 20*4 = $80.
Since 80 - 110 = - 30, Eric has a lost of $30 for 20 shirts sold.
Let y = the profit, x = number of shirts sold, then for the profit we can write:
y = 4x - 110
the slope of the equation is 4.