Final answer:
The linear model in slope-intercept form to represent the profit from selling cupcakes after spending $275 on supplies, knowing they can sell each cupcake for $3.50, is P(x) = 3.50x - 275.
Step-by-step explanation:
The linear model in slope-intercept form to represent the profit from selling cupcakes after spending $275 on supplies, knowing they can sell each cupcake for $3.50, is represented by the equation P(x) = 3.50x - 275.