Period 2 - Quiz for the week of 4/5/21 - 4/11/21

Look at the graph. Is this relation a function?

Hint: remember the vertical line test

• Yes

• No

Is this relation a function?

• Yes

• No

Is this relation a function?

*Does it pass the vertical line test?

• Yes

• No

Is this relation a function?

• Yes

• No

• Circles and ovals can't be functions!

There is a line whose y-intercept is 7 and whose slope is 7. What is its equation in slope-intercept form?

Hint: The slope-intercept form of a linear equation is

y = mx + b

• y = 7 + 7

• y = 7x + 7

• y = 7m + 7

• y = 7x + b

The slope of a line equals

• The change in x over the change in y

• The change in y over the change in x

• The change in x times the change in y

• The change in y times the change in x

Select all that are true about the slope of a line (formula)

•  $\frac{x_2-x_1}{y_{2\ }-y_1}$  

• The ratio of the "vertical change" to the "horizontal change"

• m = change in y over change in x

• A zero slope is perfectly flat in the horizontal direction

Is this a function?

• Yes

• No

Function:

• A function is: a relation from a set of inputs to a set of possible outputs where each input is related to one or more outputs.

• A function is: a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output.

Function?

• Yes

• No