The graph of a quadratic function is shown. the general form of quadratic equations is y = ax + bx + c. what
do you know about the values of a, b and c just by looking at the graph?
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a. a > 0, b = 0,c=-4
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b. a < 0,b= 1, c = 4
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c. a< 0,= 0,c = -4
d. a > 0, b = 4, c = -4

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

7

step-by-step explanation: