Fx equation in math6/2/2023 Had the linear equation y is equal to 2x plus three, that's one way to represent it, but I could represent this inĪn infinite number of ways. In Azerbaijan, China, Finland, Russia and Ukraine:Ī lot of different ways that you could representĪ linear equation. In Afghanistan, Albania, Algeria, Brazil, China, Czech Republic, Denmark, Ethiopia, France, Lebanon, Netherlands, Kosovo, Kyrgyzstan, Norway, Poland, Romania, South Korea, Surinam, Spain, Tunisia and Vietnam: y = ax + b In the UK, Australia (also), Bahamas, Bangladesh, Belgium, Brunei, Bulgaria, Cyprus, Egypt, Germany, Ghana, India, Indonesia, Ireland, Jamaica, Kenya, Kuwait, Malaysia, Malawi, Malta, Nepal, New Zealand, Nigeria, Oman, Pakistan, Peru, Singapore, Solomon Islands, South Africa, Sri Lanka, Turkey, UAE, Zambia and Zimbabwe In the US, Australia, Canada, Eritrea, Iran, Mexico, Portugal, Philippines and Saudi Arabia the notation is: Your original equation.The equation for slope-intercept for varies by your country. Because the x-values where they intersect will be solutions to You can take an equation of one variable, set both sides of them independently equal to y, graph them, and then think about where they intersect. You'd have to type in one, or in the previous example, I'll just write it out, and these are screenshots Only intersects y equals all of this business once. And then we could thinkĪbout another function, what if y is equal to two? Well y equals two would be up over there, y equals two. What about the second situation? How many solutions does theĮquation all of this business equal two have? Well same drill, we could set y equals to x to the third minus two x And so every time they intersect, that means we have a solution And then how many timesĭo these intersect? That would tell us how And let's say that the other equation or the other function is y The third minus two x squared minus x plus one, which weĪlready have graphed here. Let's imagine two functions, one is y is equal to x to Well when we thinkĪbout solutions to this, we could say, all right, well X squared minus x plus one equals negative one have? Pause this video and How many solutions does the equation x to the third minus two This third-degree polynomial right over here. So here we are told, this is the graph of y is equal to, so we have The key here is that weĬan approximate solutions to equations through graphing. You would see that x is slightly different than x equals four. And if you had a graphing calculator that could really zoom inĪnd zoom in and zoom in, you would get a value, Is that equal to five?" Let's see, three to the fourth is 81. That actually work out? "3/2 to the fourth power, If you wanted to, youĬould try to test it out. And we can see it, at least over here, it looks like x is roughly equal to four. And so we could lookĪt where they intersect and get an approximate sense Y-value for that x-value in both of these, well then that means that 3/2 to the x is going to be equal to five. Here is if we can find the x-value that gives us the same y-value on both of these equations, well that means that those To the right-hand side, we get y is equal to five. To the left-hand side, we get y is equal to 3/2 to the x power, which is what they originally give us, the graph of that. We could set y equals to each side of it. That is we could take each side of this equationĪnd set them up as a function. And this gives us a hint,Īnd especially because it's, they want us to find anĪpproximate solution, that maybe we can solve this equation or approximate a solution to Try to do this on your own before we work on this together. Use the graph to findĪn approximate solution to 3/2 to the x is equal to five. Told, this is the graph of y is equal to 3/2 to the x.
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