MCAP Review #4

Front

What is the equation for direct variation?

Back

y = kx, where k is the constant of variation.

Front

What is a constant of variation in direct variation?

Back

It is the non-zero constant 'k' in the equation y = kx.

Front

How do you determine if a table represents direct variation?

Back

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

Front

What is the y-intercept of a quadratic function f(x) = ax^2 + bx + c?

Back

The y-intercept is the value of f(0), which equals c.

Front

What does it mean for two variables to vary directly?

Back

If one variable increases, the other variable increases proportionally.

Front

If y varies directly with x and y = 3 when x = 1, what is the constant of variation?

Back

k = 3.

Front

What is the formula to find the missing value in direct variation?

Back

If y = kx, then x = y/k.

Front

What is the difference between direct and inverse variation?

Back

In direct variation, as one variable increases, the other increases; in inverse variation, as one variable increases, the other decreases.

Front

How do you find the y-intercept of a linear equation?

Back

Set x = 0 and solve for y.

Front

What is an example of a direct variation equation?

Back

y = 2x.