8th Grade Review Unit 5

What is the name of an equation whose solutions form a straight line on a coordinate plane?

• Linear Equation

• Rate of Change

• Unit Rate

• Slope

• Linear Relationship

What is the name of a set of two or more equations that contain two or more variables?

• Rate of Change

• System of Equations

• Linear Relationship

• Unit Rate

• Proportional Relationship

A full lake begins dropping at a constant rate. After 4 weeks it has dropped 3 feet. What is the unit rate of change of change in the lake’s level compared to its full level?

• 3 feet per Week

• 3/4 per week

• -3 feet per week

• -.75 feet per week

Write an equation for the table above.

• y=x+6

• y=4x+2

• y=4x-6

• y=-6x+4

Determine if the data set is a function.

(2, 5), (7, 2), (-3, 4), (2, 9), (1, 1)

• Function

• Not a Function

• Sure

• Is it Christmas yet?

If y varies directly with x by a constant of -0.2, what is the value of x when y equals -1.24?

• x=2

• x=6

• x=24

• x=6.2

The table above shows some input and output values of a function. What is the missing output value?

• 20

• 25

• 24

• 21

Which equation best represents the line in the graph. (rise over run)

• y=4/3x+2

• y=-4/3x+2

• y=4/3x-2

• 4x+3y=6

Graph the system of equations and solve.
 $y=2x+8$  
 $y=-\frac{2}{3}x$  

• (0,8)

• (0,-4)

• (-3,2)

• (-2,4)

Lucas’ heart rate beats 288 times in 4 minutes. Which equation represents the number of times her heart beats per minute?

• $y=\frac{1}{288}x$

• y=72x

• $y=\frac{1}{72}x$

• y=288x