Chapter 4

Question 0

What is a function?

Answer 0

Every input must have exactly one output

Question 1

What is relation?

Answer 1

Any set of ordered pairs

Question 2

What is the domain of a function?

Answer 2

The inputs in a data set

Question 3

What is the range of a function

Answer 3

The outputs in a data set

Question 4

What is function notation?

Answer 4

A way of writing the “rule” in shorthand so that we can apply it to different numbers and variables

Question 5

What is f(x)

Answer 5

“f of x” or “the value of f at x”

Question 6

Evaluate the function for the given values of the variable

f(x)=2x-3 when x=-2

Answer 6

f(x)=3x+2
f(-2)=3(-2)+2
f(-2)=-4

Question 7

What are the two solutions of the equation y=2x+1?

Answer 7

Solutions: (0,1) (-1/2,0)
2(0)+1 
y=1
0=2x+1
-1     -1
-1/2=2x/2
-1/2=x

Question 8

Solve 2x-5=1 algebraically

Answer 8

2x-5=1
+5 +5
2x/2=6/2
X=3

Question 9

How do you find the x and y intercepts of an equation?

Answer 9

Replace the other value with zero.