A number written in the form a+bi is called a __ number

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?

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?