Math 8 Midterm Review 2022

Math 8 Midterm Review

The midterm will be on Tuesday and Wednesday

Contents...

• ​16 questions

• No CER

• Will cover material from Unit 1​

Some text here about the topic of discussion

​A function is a relationship where every input has one output. That means that there cannot be any repeated x-values in a function.

​

To tell whether a graph is a function, we use the vertical line test. If the vertical line passes through the line or curve more than once, the relation is not a function as it has more than one output for the same input.​

​

​Some text here about the topic of discussion.

Functions

Multiple Select

Select ALL the relations that FAIL the vertical line test:

Multiple Select

Choose all the relations that represent a function

• Straight line

• Constant rate of change

• Exponent of 1 on variable term​​ of an equation

​Some text here about the topic of discussion.

​Linear Functions

​

Multiple Select

True or false: The equation y = 6x² represents a linear function

• True

• False

​

​To verify that an ordered pair is on the function, simply plug in the x value and calculate the corresponding y value.

​Some text here about the topic of discussion.

Solutions to a function

​

Multiple Select

Select all ordered pairs that satisfy the function:

y = 5x - 1

• (-2, -11)

• (1, 4)

• (3, 4)

• (0,-1)

We use linear functions to help describe a situation by determining if the y values are increasing, decreasing or are constant.

​

For example, this graph describes the journey as a turtle leaves the water and gets to the sand. ​

​

​

​

​Some text here about the topic of discussion.

Function behavior

​

Multiple Choice

This graph shows the journey of a turtle as it returns to the water.

At what time does the turtle pause on his way to the water?

• Between 5 to 8 seconds

• At 4 seconds

• After 8 seconds

• At 12 seconds

Multiple Choice

When is the turtle traveling at a slower rate?

• At 2 minutes

• After 8 seconds

• Between 3 to 4 seconds

• Before 4 seconds

• Constant of proportionality (k)

• equation in the form y = kx

• Use unit rate to analyze the graph

​

​Some text here about the topic of discussion.

Proportional Graphs

​

Fill in the Blanks

Multiple Choice

Select the statement that best describes this graph:

• Every 40 minutes, Daniel does one sit-up.

• Daniel completes 40 sit-ups per minute

• Daniel is not very good at sit-ups

• After 8 minutes, Daniel gives up and stops doing sit-ups

Fill in the Blanks

Multiple Choice

Select the equation that represents this function:

• y = 96x

• y = 3x

• y = 16x

• y = 12x

• ​Constant rate of change

• Find unit rate by dividing y/x

• Use unit rate to analyze the table​

​

​Some text here about the topic of discussion.

Proportional Table

​

Multiple Choice

True or false: You only need 3 cans of paint to complete 9 birdhouses

• True

• False

Multiple Choice

According to this table, what would OTHER concrete blocks weigh if they are half the weight of the current blocks?

• 3 lbs

• 10 kg

• 15 kg

• 5 kg

Fill in the Blanks