PLEASE HELP!! Is this function linear or nonlinear? X -0.2 0.7 0 0.4 0.2 0.1 0.4 0.3 0.6 0.6 AND how do you know?

In stepmber, daniel and justin opened a business. during their first three months of business, their average monthly profit was $51. if during their first month, they lost $29, and during their second month, they gained $115, what was their profit or loss for their third plzzz i will give you 299 points

Will mark the brainliest. paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each?

What is the period of the sinusoidal function ?