functions teacher twins©2014. warm up solve each equation. 1.2x – 6 = 22 2.3 + 5x = -32 3.x + 29...
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Functions
Teacher Twins©2014
Warm UpSolve each equation.
1. 2x – 6 = 222. 3 + 5x = -323. X + 29 = 144. 6x – 5 – 4x = 17
x = 14 x = - 7x = -15
x = 11
Functions
What is a Function?
What is a Function?Each input value gives back exactly one output value.
Example: Input 7 into y = 2x + 9. y = 2(7) + 9
y = 23Input is 7 output is 23.
x = 7
Find the output when given the input for the function. y = x - 5
Remember x is the input and y is the output.-6
-5-4-3
Complete the function table.
-1 - 10
0 - 10
1 - 10
2 - 10
- 11
- 10
- 9
- 8
Another name for the input (x value) is domain.
Another name for the output (y value) is range.
What is the domain? What is the range?
(-3, 8), (0,7), (-4,-6), (2, -5)
Domain = - 4, - 3, 0, 2
Range = - 6, - 5, 7, 8
{10, 40, 61}
ClosureFind the range of the function y = 4x if the domain is {-1, 0, 1, 2}.
{-4, 0, 4, 8}