Lesson 4 - Input and Output of Functions

Section 2.1 #2 Evaluating Inputs of Functions

Find f(x) when x = -7 if

Section 2.1 #5 Evaluating Inputs of Functions

Solve for x.

Section 2.1 #14 Given

Then:

(a)

(b)

(c)

(d)

(e)

(f)

Section 2.1 #15 Given

Find and simplify

(a) i .

ii.

(b) Solve for

Section 2.1 #18 From a graph of a functions do the following (Figure 2.3)

(a)
x -2 -1 0 1 2 3
h(x) 0 9 8 3 0 6

(b) h(3) - h(1) = 6 - 3 = 3

(c) h(2) - h(0) = 0 -8 = -8

(d) 2h(0) = 2(8) = 16

(e) h(1) + 3 = 3 + 3 = 6

Section 2.1 #19 Given

Then:

(a)

(b)

(c)

(d) vertical intercept is y = -1 (when x = 0)

(e) The graph crosses the x-axis when f(x) = 0

or when from (b)

Section 2.1 #23 Given as the velocity in ft/sec of an object at time t, in seconds.

Then:

(a) Initial velocity,

(b)

(c) v(3) is the velocity of the object at time t = 3 seconds.