Evaluating Functions

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• PRECALCULUS Objective: To evaluate a function by the given variables to determine the output.
• Okay kids, today we are going to learn how to evaluate functions.
• December 3 2018﻿
• December 3 2018﻿
• To evaluate function the independent  variable x plays the role of a placeholder. For example, the function F(x)=3x^2+x-5 to evaluate f at a number you should substitute all the x variables with the number asked for in the question.
• Evaluate the function with following x values Find: f(2) Find: f(-1)
• Who can answer the following question?﻿
• PRECALCULUS Objective: To evaluate a function by the given variables to determine the output.
• Good Job Alexandra!!﻿
• Please do it on the board
• December 3 2018﻿
• I CAN !!﻿
• f(x)=3x^2+x+5 f(2) f(2)=3(2)^2+2+5 f(2)=12+2+5 f(2)=19
• PRECALCULUS Objective: To evaluate a function by the given variables to determine the output.
• Who can do the one with negative 1﻿?
• ﻿Good Job Elizabeth!!
• I can definitely ﻿do it.
• f(x)=3x^2+x+5 f(-1) f(-1)=3(-1)^2+(-1)+5 f(-1)=3+(-1)+5 f(-1)=4+5 f(-1)=9
• ﻿MRS. LEA﻿
• Now, I'll give you a small coverage of what we will do tomorrow we will do the same thing with just a little bit harder value to put instead of x known as a polynomial equation where you should find for example f(x+5) which will be a little bit tougher variables.
• CLASS DISMISSED!!﻿
• That was a wonderful class . I understood everything.
• True. I loved it.I can't wait for tomorrow.
• ISG DAMMAM
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