Appleseed, a tech company, spends a fixed cost of $1500 to manufacture the wristbands for their new Appleseed watch, plus $100 per unit manufactured .

The line can be understood as an infinite set of points aligned in a single direction. A line can be expressed by an equation that follows the model y = m * x + b, where "x" e "y" are the variables in a plane. In this expression m is called the slope of the line and is related to the inclination of the line, and b is the independent term and is the value of the point at which the line cuts to the vertical axis (y axis) in the plane.

In general, the slope represents the variation of y with respect to the variation of x. In this case it represents the variation of the fixed cost to manufacture the bracelets for your new Appleseed watch (y) according to each manufactured unit (x). Then the slope represents the cost per unit manufactured, having a value of $ 100 per unit manufactured.

The intersection "y" represents the fixed cost of manufacturing the watches. It is possible to observe in the graph that initially the manufacturing cost of the bracelets for your new Appleseed watch is $ 1500, because it is the value where the line cuts to the y-axis.

Finally, the equation of the line represented is:

y=100*x+1500