Slope Direct Variation Constant of Variation and Proportions

Write an equation for this relationship.

• y = 4x

• y = 1/8x

• y = 1/4x

• y = 8x

Find the slope of the line that passes through the points (2, 4) and (6, 12)

• 1/2

• -1/2

• 2

• -2

 Is this table proportional or non-proportional?

• Proportional

• Non-Proportional

• 4

• C.O.P.

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.

Write an equation for this relationship.

• y=4x

• y=1/8x

• y=1/4x

• y=8x

What is the constant of proportionality?

• 8

• 16

• 24

• 2

The value of y varies directly with x.  Which function represents the relationship between x and y if y = 20/3 when x = 30?

• y = 200x

• y = 2/9x

• y = 110/3x

• y = 9/2x

Write a direct variation equation when y = 18 and x = 12

• y = 6x

• y = 3/2 x

• y = 2/3 x

• y = 1/6 x

If m and n vary directly and m = 14 when n = 3.5, what is the value of m when n = 8?

• 4

• 32

• 2

• 6.2

n varies directly with c. If c = 24 when n = 18, what is c when n = 22?

• 88/3

• 28

• 66/4

• 24