Function Problems

For a mapping to be considered a function, there must be _______.

• No more than 1 arrow from each x-value

• No more than 1 arrow to each y-value

• At least 1 arrow from each x-value

• At least 1 arrow from each y-value

A table needs to have the same ____ to be proportional.

• Ratio of y/x

• Ratio of x/y

• y-intercept

• slope

A graph needs to go through _____ to be proportional.

• The origin

• The y-intercept

• The y-axis

• The x-axis

A proportional equation looks like...

• y=kx

• y=mx+b

• y=kx+b

• y=ax²+bx+c

The formula for slope has _____ on top.

• y₂- y₁

• x₂- x₁

• y₁- y₂

• x₁- x₂

The formula for slope has _____ on bottom.

• y₂- y₁

• x₂- x₁

• y₁- y₂

• x₁- x₂

In the equation y=mx+b, m is the ____.

• Slope

• Y-intercept

• X-intercept

• Origin

In the equation y=mx+b, b is the ____.

• Slope

• Y-intercept

• X-intercept

• Origin

The y-intercept always has an x-value of ____.

• Zero

• Positive

• Negative

• Anything

For a set of ordered pairs to be considered a function, ______ cannot repeat.

• X-values

• Y-values

• Positive Numbers

• Negative Numbers