10.17.23 Bell Ringer-Unit 1

Anand's math teacher finds that there's roughly a linear relationship between the amount of time students spend on their homework and their weekly quiz scores. This relationship can be represented by the equation y=7.2x+55, where y represents the expected quiz score and x represents hours spent on homework that week. What is the meaning of the x-value when y=77?

• The number of hours a student should spend on their homework to expect a score of 77 on the quiz.

• The change in expected quiz score for every additional one hour students spend on their homework.

• A student's expected quiz score if they spent no time on their homework.

• A student's expected quiz score if they spent 77 hours on their homework.

At the beginning of spring, Jin planted a small sunflower in his backyard. The sunflower's height in inches, ℎ, after w weeks, is given by the equation ℎ=18+2.5w. What could the number 18 represent in the equation?

• The sunflower's height after 0 weeks.

• The sunflower's height after one week.

• The sunflower's final height

• The rate of change in the sunflower's height.

The actual y-value is​ (a)   . The predicted y-value is ​ (b)   . The residual is ​ (c)   .

• arrow B
• arrow C
• arrow A

To calculate the ​ (a)   , you must find the ​ (b)   between the ​ (c)   ​​​​​​​y-value and the

​ (d)   y-value.

• residual
• difference
• actual
• predicted

• (10, 3)

• (2, 15)

Avery is signing up for a gym membership with a one-time fee to join and then a monthly fee to remain a member. The total cost of the gym membership over t months is given by the equation C=40t+150. What is the slope of the equation and what is its interpretation in the context of the problem?

The slope of the function is ​ (a)   ​​​​​​​which represents ​ (b)   .

​​​​

• 40
• 150
• one
• the monthly fee to remain a member
• number of months Avery is a member
• the total fees for one year
• the one-time joining fee

Which of the following describes the solution on the number line?

Match the following equations to their names.

• y = (x + 1)² - 2

• None

• Quadratic

• y = 3(0.2)^x

• Exponential Decay

• y = 2(x - 2) + 3

• Exponential Growth

• y = 6(1.5)^x

• Linear

Given (2, 3), perform the transformation and give the new point.

2f(x)

• (4, 3)

• (2, 6)

An elevator travels down from the top floor of a skyscraper. Its height, in feet, is given by the equation ℎ=1450−11t, where ℎ represents the elevator's height, in feet, and t represents the time, in seconds. What could the number 11 represent in the equation?

• How quickly the elevator descends, in feet per second.

• The elevator's final height.

• How long it takes for the elevator to reach the ground floor.

• The elevator's height after one second.