A.2D Redo

Front

What is direct variation?

Back

Direct variation is a relationship between two variables where one variable is a constant multiple of the other. It can be expressed as y = kx, where k is a non-zero constant.

Front

If y varies directly with x, and y = 15 when x = 5, what is the direct variation equation?

Back

y = 3x

Front

If y varies directly with x, and y = 3 when x = 9, what is the value of x when y = 18?

Back

x = 54

Front

If y varies directly with x, and y = 9 when x = 3, what is the value of x when y = 27?

Back

x = 9

Front

If y varies directly with x, and y = 3 when x = 21, what is the direct variation equation?

Back

y = 1/7x

Front

If y varies directly with x, and y = 55 when x = 5, what is the value of y when x = 9?

Back

y = 99

Front

What is the constant of variation in direct variation?

Back

The constant of variation (k) is the ratio of y to x in a direct variation equation, represented as k = y/x.

Front

How do you find the constant of variation from a direct variation equation?

Back

To find the constant of variation, rearrange the equation y = kx to k = y/x using known values of y and x.

Front

What is the formula for direct variation?

Back

The formula for direct variation is y = kx, where k is the constant of variation.

Front

If y = 4 when x = 2, what is the direct variation equation?

Back

y = 2x