+0  
 
0
70
1
avatar

Question Help An international food festival charges for admission and for each sample of food. Admission and 5 samples cost ​$9.25 Admission and 8 samples cost ​$12.25. Write a linear function rule to model the cost y for any number of samples x.

Guest Mar 8, 2017
Sort: 

1+0 Answers

 #1
avatar+10614 
0

y=mx+b

you have TWO data points given   (5,9.25)   and  (8, 12.25)

 

Find slope, m=   (y1-y2) / (x1-x2)

                       (9.25-12.25) / (5-8) = -3/-3 = 1

 

so   y= mx + b    now becomes  y = (1) x + b    Substitute in one of the points to find  b :

 

                                                   9.25 = 5 + b       b= 4.25

so your equation is now

 

y= x + 4.25         which shows the admission is 4.25 and each sample costs 1.00 

ElectricPavlov  Mar 8, 2017

6 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details