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