Unit 3 (Linear Functions)

Question 1

Direct variation means

Answer 1

When one variable increases or decreases, the other variable does the same

Question 2

Inverse variation means

Answer 2

When one variable increases or decreases, the other variable does the opposite

Question 3

The direct variation formula is

Answer 3

x/y

Question 4

The inverse variation formula is

Answer 4

xy = k

or y = k/x

Question 5

The slope is

Answer 5

The rate of change between 2 points

Question 6

Slope-intercept form is

Answer 6

y = mx + b

Question 7

Point-slope form is

Answer 7

y - y₁ = m(x - x₁)

Question 8

Parralel lines have the same ______.

Answer 8

slopes

Question 9

Perpendicular lines have _______ slopes.

Answer 9

inverse

Question 10

The first step in evaluating 3 step functions is ______ two pairs of functions.

Answer 10

adding

Question 11

The second step in evaluating 3 step functions is ______ the remaining functions.

Answer 11

adding

Question 12

When graphing the piecewise function f(x) = 2x + 5, x > 0, the graph of 2x + 5 is before ____, and not after.

Answer 12

zero

Question 13

If a function ends in a contradiction, then

Answer 13

there is no solution