Desmos Algebra 1 Unit 4

Ms. Ruggiero is having her roof fixed. The cost is $3000. The amount each roofer earns, R, varies inversely with the number of roofers, N, that will fix her roof. Which equation best represents this situation?

• R = 3000N

• N = 3000R

• RN = 3000

• N / R = 3000

The point (-1, 3) is an element of a direct variation. Select all points that are elements of this variation. (Hint: Use Desmos to help you!).

• (0, 0)

• (1, -3)

• (3, 1)

• (1, 3)

Which equation represents the graph?

• y = 3x + 15

• y = 1/5 x + 15

• y = -1/5 x + 3

• y = 15x + 3

Which set of values is a function?

• <(9,5), (10,5), (9,-5), (10,-5)>

• <(3,4), (4,-3), (7,4), (3, 8)>

• <(6,-5), (7, -3), (8, -1), (9, 1)>

• <(2, -2), (5, 9), (5, -7), (1, 4)>

Tags

CCSS.8.F.A.1

Does the graph below represent a function?

• Yes, it represents a function because each input is paired with exactly one output.

• No, it does not represent a function because not every input is paired with exactly one output.

$f\left(x\right)=5x-12$ What is $f\left(-4\right)$

• -32

• -3

• -12

• 3

Tags

CCSS.HSF.IF.A.2

In the equation, y = mx + b, the letter b is the ___________.

• y-intercept

• x-intercept

• slope

• rate of change

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

What are the x- and y-intercepts of the linear function given by the equation 3x + 4y = 12

• (4, 0) and (0, -3)

• (-3, -4)

• (-4, 0) and (0, 3)

• (4, 0) and (0, 3)

What is the solution to this system of equations?

• (4, -1)

• (-1, 4)

• (-4, 1)

• (-4, -1)

Tags

CCSS.8.EE.C.8B

If a system of equations has no solution, what does the graph look like? 

• intersecting lines

• parallel lines

• skew lines

• intersecting lines

Tags

CCSS.8.EE.C.8A