How does the function y = -2x + 6 differ from the linear parent function?

What is the value of x in the diagram below?

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

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%