Question

Rodney is starting a horse-grooming business.
*his initial expense will be one-time cost of 200 for equipment.
* His earnings will be $40 per horse groomed
rodney's profit will be equal to his earnings for all horses groomed minus his initial expense

Answer 1

Make an equation.

Answer 2

y = mx + b

Where b is the initial value in these types of cases.
Which the variable value is m.

So now rewrite it as:

y = 40x - 200