Functions

$\rhd$ What is a function? (7:56) (a) Let $f(x)=2x-5$ , find $f(x+h)-f(x)$ . (b) Let $f(x)=3x+2$ , find the difference quotient $\dfrac{f(x+h)-f(x)}{h}$ .
$\rhd$ Evaluating functions from equations (0:58) Let $f(x)=49-x^2$ , find the value of $f(5)$ .
* Practice Type of problem: For $g(r)=25-3r$ , find the value of $g(4)$ .
$\rhd$ Evaluating functions from graphs (0:43) Given a graph, find $f(-6)$ .
* Practice Type of problem: Given a graph, find $k(-1)$ .
$\rhd$ Evaluating expressions with function notation (1:22) Given the graphs of $f(x)$ and $g(x)$ , find $2\cdot f(-6)+g(1)$ .
* Practice Type of problem: Given the graphs of $f(x)$ and $g(x)$ , find $5\cdot f(1)+5\cdot g(9)$ .

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The OpenLab at City Tech:A place to learn, work, and share

The OpenLab at City Tech:A place to learn, work, and share

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The OpenLab at City Tech:A place to learn, work, and share

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