Chapter 6 CFA

Front

What is an additive relationship?

Back

An additive relationship is when one quantity is increased or decreased by a constant amount. For example, if y = x + 3, y is always 3 more than x.

Front

What is a multiplicative relationship?

Back

A multiplicative relationship is when one quantity is a constant multiple of another. For example, if y = 4x, y is always 4 times x.

Front

What does the equation w = d - 1.25 represent?

Back

This equation shows that the amount of money Alice has after riding the bus (w) is 1.25 less than the amount she has at the beginning of the day (d).

Front

How do you calculate 5% of a value?

Back

To calculate 5% of a value, multiply the value by 0.05 or divide the value by 20.

Front

What is the equivalent fraction of 5%?

Back

5% is equivalent to 1/20.

Front

What is the relationship represented by r = q + 10.1?

Back

This equation indicates that r is always 10.1 more than q.

Front

How can you identify an additive relationship from a table?

Back

Look for a constant difference between corresponding values of x and y. If the difference is the same, it is additive.

Front

How can you identify a multiplicative relationship from a table?

Back

Look for a constant ratio between corresponding values of x and y. If the ratio is the same, it is multiplicative.

Front

What does it mean if y is 3 more than x?

Back

It means that for every value of x, the value of y is obtained by adding 3 to x.

Front

What is the general form of an equation for an additive relationship?

Back

The general form is y = mx + b, where m is the constant difference and b is the starting value.