Graphing Direct Variation Quiz

What is the form of a direct variation equation?

• y = x^2

• y = ax^2 + bx + c

• y = kx

• y = mx + b

In a direct variation equation, what does the constant of variation (k) represent?

• The slope

• The vertex

• The x-intercept

• The y-intercept

When graphing y = -2x, what is the rise over run?

• Down 1, right 2

• Down 2, right 1

• Up 2, right 1

• Up 1, right 2

Which point is always on the graph of a direct variation equation?

• (1, 0)

• (1, 1)

• (0, 1)

• (0, 0)

How do you interpret the slope of y = 2/3x when graphing?

• Up 2, left 3

• Up 2, right 3

• Down 2, left 3

• Down 2, right 3

What is the equivalent fraction for the decimal 0.5 in the equation y = 0.5x?

• 3/4

• 2/3

• 1/2

• 1/4

When graphing y = -3/4x, how should the negative sign be applied?

• To both the numerator and denominator

• To the numerator only

• To neither

• To the denominator only

What is the equation for a direct variation where the y-value is negative 3 times the x-value?

• y = 3x

• y = -3x

• y = x - 3

• y = 3 - x

If the y-value is 2/5 times the x-value, what is the equation?

• y = 5x

• y = 2x

• y = 2/5x

• y = 5/2x

In the context of direct variation, what is the smallest number of points needed to graph a line?

• Three

• Two

• One

• Four