HW Answers:

P253 255 ‐#13 24, 30, 31, 38 44 ‐ ‐

Day 28 cont. Section 4-3

If x is the independent variable and y is the dependent variable, then function notation for y is f(x), read “f of x,” where f names the function.

• y is a function of x• So y = f(x)

You can think of a function as an input-output machine. For f(x) = 5x.The input is what you put in for x and the output is 5 times that x value.

input

10

x

functionf(x)=5x

output

5x

6

30

2

Evaluate the function at the given x values

f(x) = 8x + 2 when x = 0 and x = -2

HW: 4-3 WS