Give an equation for the graph. 7+
6
5
4
3
7 6 5 4 3 -2 -1
-1
1 2 3 4 5 6
-2
-3
-4
-5
-6
-7+
g
f() =
Preview

y = (1/60) x² - (7/20) x + 49/30

Step-by-step explanation:

equation formula:    y = ax² + bx + c

pass (-1,2) (2,1) (7,0)

(-1,2):  a - b + c = 2   ... (1)

(2,1):   4a + 2b + c = 1   ... (2)

(7,0):   49a + 7b + c = 0   ... (3)

(2)-(1):  3a + 3b = -1   ... (4)

(3)-(2):  45a + 5b = -1   ... (5)

(4)*15-(5): 40b = -14         b = - 7/20   ... (6)

(4): 3a = -1 - 3*(-7/20) = 1/20        a = 1/60    ...(7)

(1): c = 2 - 1/60 + (-7/20) = 49/30        c =  49/30

equation:  y = (1/60) x² - (7/20) x + 49/30

step-by-step explanation:

milk=16 large

soda=280 kids

juice box=82 regular

63 soda +63 regular

124 large total

answer: 1 + 1 = 11

step-by-step explanation: