STAAR Review C2-3

A system of equations is graphed on the grid.

Which system of equations is best represented by the graph?

Answer explanation

y=mx+b

1. Find the (b) y-intercept

2. Find the (m) slope

or

Stat Edit

Find two distinct points in each line to find the equation for each line.

Is this graph a function or not a function?

• Function

• Not a Function

Answer explanation

In a function, the x does NOT repeat.

Vertical Line Test

- Pass: touches the graph once

- Fail: touches the graph more than once

Is this graph a function or not a function? 

• Function 

• Not a Function

Answer explanation

In a function, the x does NOT repeat.

Vertical Line Test

- Pass: touches the graph once

- Fail: touches the graph more than once

Answer explanation

Rewrite your equations as y=

Then, graph onto Desmos (STAAR Version) to see their point of interersection.

What is the approximate constant rate of change in miles per minute?

• about 8 miles per minute

• about 12 miles per minute

• about 10 miles per minute

• about 290 miles per minute

Answer explanation

DCMAM

Distribute

Combine like terms

Move the variable

Add or Subtract

Multiply or Divide

The value of y is directly proportional to the value of x. When x = 512, y = 128.

What is the value of y when x = 64?

• 256

• 32

• 16

• 8

Answer explanation

Direct Variation (Proportion)

Answer explanation

Solution set found shaded area.

The graph of a line is shown.

What are the equation and the slope of the line?

Select the correct answer for each box. Not all answers will be used.

Equation:​ ​ (a)   ​ ​

Slope: ​ ​ (b)  

• y = 2
• 0
• x = 2
• y = 2x
• 2
• Undefined

Answer explanation

HOY VUX

Horizontal Line

0 - Zero Slope

Y =

Which of the relations shown represent y as a function of x?

Select ONE correct answer in each row.

Answer explanation

In a function, the x does NOT repeat.

Vertical Line Test

- Pass: touches the graph once

- Fail: touches the graph more than once