Question

What is an equation that is parallel to y=4x+7

Answer 1

that would be any line that has a slope of 4, so y = 4x + b, where be can be any value

Answer 2

sorry, that's "b" can be any value

Answer 3

@KeeganR use a graphing calculator or graph them on paper and see for yourself. Simply playing with y=mx+b by using different m's while keeping b the same or different b's while keeping m the same will show you exactly how functions work. Spend just 5 minutes playing with them. Try to understand, and you will understand.