Ratio Proportion Scale Factor and Dilation

Front

What is a Ratio?

Back

It's a comparison of two quantities.

Front

How do you express a ratio as a fraction?

Back

Divide the first quantity by the second quantity.

Front

What is the scale factor in dilation?

Back

The scale factor is the ratio of the length of a side of the image to the length of the corresponding side of the original figure.

Front

If the scale factor is greater than 1, what type of transformation occurs?

Back

Enlargement.

Front

If the scale factor is less than 1, what type of transformation occurs?

Back

Reduction.

Front

Calculate the cost of 10 pounds of hamburger if 3 pounds cost $6.

Back

$20.

Front

Express the ratio of 18 ounces to 3 cups in simplest form.

Back

6 to 1.

Front

What is the formula for dilating a point (x, y) by a scale factor of k?

Back

(kx, ky).

Front

What are the coordinates of point A(3,3) after dilation by a scale factor of 3?

Back

A'(9,9).

Front

What does it mean to dilate a figure?

Back

To resize the figure proportionally from a center point.