Unlimited Practice: Proportionality

Nikolas is making a scale model of a building. The actual height of the building is 2,000 feet. Nikolas wants to make a model using the scale 2 inches of the model for every 20 feet of the actual building.

Which equation can Nikolas use to determing x, the height in inches, the scale model should be?

$\frac{2,000}{x} = \frac{2}{20}$

$\frac{x}{2,000} = \frac{2}{20}$

$\frac{x}{2,000} = \frac{20}{2}$

$2,000x = 2 \times 20$

x	y
7	24.5
8	28
9	31.5
10	35

Based on the table above, which statement describes the relationship between x and y?

The relationship is not proportional because the ratio of x to y is constant.

The relationship is not proportional because the difference between x to y is constant.

The relationship is proportional because the difference between x to y is constant.

The relationship is proportional because the ratio of x to y is constant.

Natasha is making a scale model of a building. The actual height of the building is 2,500 feet. Natasha wants to make a model using the scale 4.5 inches of the model for every 40 feet of the actual building.

Which equation can Natasha use to determing x, the height in inches, the scale model should be?

$2,500x = \frac{4.5}{40}$

$2,500x = 4.5 \times 40$

$x = \frac{4.5}{40} \times 2,500$

$\frac{x}{2,500} = \frac{4.5}{40}$

A recipe requires 1.1 cups of flour and 2.64 teaspoons of vanilla.

If Desiree uses 2.2 cups of flour, how many teaspoons of vanilla should be used?

3.48

5.68

4.08

5.28