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eimsori [14]
3 years ago
8

I need help finding the function rule

Mathematics
1 answer:
emmainna [20.7K]3 years ago
4 0

Answer:

f(x) = - x + 20

Step-by-step explanation:

Start with x =0

that means that f(0) = 20

So

y = f(x)

y = ax + 20    Now if x = 1 , y = 18

18 = a(2) + 20 Subtract 20

18 - 20 = 2a     combine

- 2 = 2a            Switch

2a = - 2            Divide by 2

a = -2/2            Combine  

a = - 1            

y = - x + 20       Answer or

f(x) = -x + 20     Answer


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