Linear Models for Predictions

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 6 absences should get approximately what score on the final exam?

• 65

• 92

• 70

• 76

Which statement below accurately represents the graph?

• $100 is earned for each hour worked

• $100 is earned for every 2 hours worked

• $500 is earned for every 8 hours worked

• $400 is earned for every 6 hours worked

The equation below represents an elevator's height after an amount of seconds. Using this equation, what should the height of the elevator be after 14 seconds?
h(s) = -3.8s + 290

• 80

• 236.8

• -80

• 72.6

The amount of water in the bucket ( in pints) can be modeled by the equation V(n) = 2n + 7 where n is the number of pitchers used to put water in the bucket.  If the bucket contains 29 pints of water, how many pitchers of water were used to fill it?

• 11

• 65

• 9

• 18

The GPA of a student can be predicted using the equation
G(h) = 1.4h + 1.4  where h is the hours the student spends studying.  How many hours did a student spend studying if they have a GPA of 4.2?

• 4

• 3

• not enough information

• 2

R(n)=125 + 80n models the amount of money R(n) in the register after selling n tickets. How much money is in the register before selling any tickets?

• $125

• $80

• $205

• $45

R(n)=125 + 80n models the amount of money R(n) in the register after selling n tickets. How many tickets must be sold to have $18,445 in the register?

• 233

• 92

• 229

• 119

A fitness club opens with 80 members. Each month the membership increases by 15 members. Which equation represents the relationship between the number of months the club has been opened, n, and the total fitness club membership, M?

• M(n)=15n

• M(n)=15n+80

• M(n)=n+15

• M(n)=80n+15

The function defined by f(n) = 12n + 500
represents the total amount given to charity as a function of the number of students present at the event.
If the school would like to donate $3000 to its favorite charity, how many students will have to attend to make that happen?

• 229

• 219

• 239

• 209

The value of a particular car model t years after its purchased is given by
V(t) = 25000-3000t
What does V(0) represent?

• Value after 1 year

• Value after 1 week

• Value after 1 month

• Purchase price of the car