What is the Evangelical view on tithing? Do Evangelical (by which I mean, taking the Bible as the ultimate earthly source of authority) Christians believe giving 10% of your income is a law for Christians?

Note: this question is related to Was tithing 10% required or encouraged by the early church? After asking that question, a moderator said it was too broad and made it specifically about the early church (which I agreed with). This question is intended to be a more specific version of what I really want to ask. See that question for more details.
This is at least one modern evangelical view...

It is true that the New Testament really does not prescribe tithing, that is, giving 10% of your income.  It does, however, prescribe giving:


  Each one must give as he has decided in his heart, not reluctantly or
  under compulsion, for God loves a cheerful giver.  2 Corinthians 9:7


The church at Phillip specifically financially supported the ministry of Paul:


  Even in Thessalonica you sent me help for my needs once and again.  Philippians 4:16


Another aspect is to consider that, as believers, we understand that everything we have comes from God, so we must honor God with 100% of our income, time, talents, and possessions--not just 10% of our income.

So, since there is a prescription to give, but not specific amount prescribed, it is common to use the tithe (10%) as a great pattern to follow.  

So, in most biblically oriented circles that I've been involved with, the tithe is a great benchmark.  That means we are free to give whatever amount and should cheerfully give generously to the work of Christ all over the world.  Generosity may mean 5% for some, but others may be able to comfortably give 15%-20%.  

Indeed, for people with very high income levels, 10% could be considered hardly generous.  The point is to be as generous as we can and to enjoy the pleasure of giving.  My personal hope is to continue increasing my percentage as my income grows.

It really is more blessed to give than to receive, and this is true in many different ways.