y=kx Review

Front

What does the equation y = kx represent?

Back

It represents a direct variation where y is directly proportional to x, with k being the constant of proportionality.

Front

What is the constant of proportionality in the equation y = 19.25x?

Back

The constant of proportionality is 19.25.

Front

If y = 45x, what is the value of y when x = 2?

Back

y = 90.

Front

What is the formula to find the constant of proportionality (k)?

Back

k = y/x.

Front

In the equation y = kx, if k = 0.20, what is the relationship between y and x?

Back

y is 20% of x.

Front

What does k represent in the context of direct variation?

Back

k represents the constant of proportionality.

Front

If the constant of proportionality is 40, what is the equation for y when x = 5?

Back

y = 200.

Front

Which of the following represents a direct variation: y = 3x + 2 or y = 4x?

Back

y = 4x represents a direct variation.

Front

How do you determine if a table of values represents a proportional relationship?

Back

Check if the ratio of y to x is constant for all pairs.

Front

What is the graphical representation of y = kx?

Back

A straight line passing through the origin with slope k.