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.

Tags

CCSS.HSF-LE.A.1B

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.

Tags

CCSS.HSF-IF.C.7A

Front

What does it mean for two variables to vary directly?

Back

If one variable increases, the other variable increases proportionally.

Tags

CCSS.HSF-LE.A.1B

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.

Tags

CCSS.HSF-LE.A.1B

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.