Wed_Slope_Exponential Functions

Amy is on a weight loss show. When the show began, she weighed 231 pounds. During the show, she lost 4 pounds per week. Which equation represents the amount of weight she lost?

• y = 4 - 231x
• y = 231x - 4
• y = 231 - 4x 
• y = 4x + 231

An airplane 30,000 feet above the ground begins descending at a rate of 2,000 feet per minute.  Write an equation to model the situation.

• y = 30,000ft - 2,000ft(x)
• y = 30,000ft + 2,000ft(x)
• y = 30,000ft(x) - 2,000ft

For babysitting, Nicole charges a flat fee of $3, plus $5 per hour. Write an equation for the cost, C, after h hours of babysitting. 

• C = 5h + 3
• C = 3h + 5
• H = 5c + 3
• H = 3c + 5

What is the slope of the line through the points (1, 2) and (8, 6)?

• 7/4
• 4/7
• 5/6
• 6/5

Tags

CCSS.8.EE.B.6

CCSS.8.F.B.4

CCSS.8.SP.A.3

What is the slope?

• 5
• 1/5
• 15
• 10

Tags

CCSS.8.EE.B.5

In the equation y=mx+b, what does the m represent?

• slope
• y-intercept
• linear
• point-slope

Tags

CCSS.8.F.A.3

CCSS.8.EE.B.6

What is the value and unit of the y-intercept for this graph?

• 0 hours
• 0 cm
• ¹/₂ hour
• 1/2 cm

If Karen is making cupcakes represented by the equation y=12x where y is the number of cupcakes and x is the number of hours spent cooking, and Sarah makes cupcakes as represented in the table, who is faster?
x         0     1      2     3
 y         0   16   32  48

• Karen
• Sarah

Two brothers went shopping at a back-to-school sale where all shirts and shorts were the same price. The younger brother spent $175 on 7 new shirts and 7 pairs of shorts. The older brother purchased 6 new shirts and 7 pairs of shorts and paid a total of $165. Which equation shows how much the YOUNGER brother spent using x as the shirt price and y as the shorts price.

• 13x + 14y = 175

• 7x + 7y = 175

• 6x + 7y = 165

• 7x + 7y = 165

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.SSE.A.1

Alexandra finds that she can give 3 haircuts and 2 hair dyes in 315 minutes. Giving 2 haircuts and 4 hair dyes takes 450 minutes. Which system of equations represents the situation? Use x as the number of haircuts; use y as the number of hair dyes.

• 3x + 2y = 315

  2x + 4y = 450

• 3x + 2y = 450

  2x + 4y = 315

• 2x + 2y = 315

  3x + 4y = 450

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.CED.A.3