Write an equation in slope intercept form given m=2 and b=1

What is the number 321,000,000 in scientific notation? also what is the number? ?

Clara schumann is buying bagels for her coworkers, she buys a dozen bagels priced at $5.49 a dozen. the bakery's cost for making the bagels is $2.25 per dozen. what is the markup rate based on selling price on a dozen bagels?

Which graph represents the given linear function 4x+2y=3