M8 Midterm Review

Midterm Review

Midterm is Thursday or Friday this week!

Contents:

• 15 questions

• 3 of them will be short response

• No CER (this time ;) )

• It will cover Units 2 & 3, but most heavy on Unit 3 and our recent graphing lessons.

Unit 2

I can identify a function.

Determining a function

A function is a relationship when every input has only 1 output.

This mapping is a function.

We sometimes remember this as repeated x values.

Multiple Choice

This mapping _________ a function.

• is not

• is

Multiple Choice

This table _________ a function.

• is not

• is

Vertical Line Test

This allows us to identify if a graph is a function

If the line crosses through the function more than once, that means that the x-value/input has more than one output.

Multiple Select

Select ALL graphs that FAIL the Vertical Line Test.

Unit 2

I can identify and apply function rules to proportional tables and graphs.

Proportional Functions

Proportional relationships are functions that:

-are straight lines on a graph

-go through the origin

-the table has a values that multiplied by x gives y

Multiple Select

Select all that show a proportional linear relationship.

• $y=-2x$

Multiple Choice

What is the equation for this proportional table?

• $y=2x$

• $y=1x$

• $y=\frac{1}{2}x$

Unit 3

I can identify initial value and rate of change from any table, graph or equation.

Non-Proportional Linear Relationships

Multiple Select

Slope can be described by... (select all that apply)

• $\frac{rise}{run}$

• $\frac{change\ in\ y}{change\ in\ x}$

• $\frac{vertical\ \ change}{horizontal\ \ change}$

• Steepness of a line

From a table

Slope is the ratio (fraction) of change in y to change in x.

You can get this from a pattern in a consistent table. Or you can use any two rows to calculate in an inconsistent table.

The initial value is the y value when x is zero.

Fill in the Blanks

The initial value of this table is

.

Fill in the Blanks

The vertical change of this graph is

.

Multiple Choice

The equation for this line is:

• $y=4x+1$

• $y=6x+1$

• $y=\frac{2}{3}x\ +1$

Unit 3

I can graph the equation of a linear relationship from its equation.

Graphing Slope Intercept Form

1. Begin with "b" - the y intercept

2. FROM there, move with "m" - vertical over horizontal change

Multiple Choice

Which shows the correct work to graph the equation

 $y=2x-3$  ?