Round off 3. 55 to one significant figure
1 answer:
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Answer:
Step-by-step explanation:
Quadratic function-
It is a function that can be represented by an equation of the form , where
In a quadratic function, the greatest power of the variable is 2.
As in the first option the highest power is 3, so it is not a quadratic function.
Even though the power of x is 2 in the third option, but as it is in the denominator, so the overall power of x becomes -2. Hence it is not a quadratic function.
As the coefficient of is 0 in case of fourth option, so it is not a quadratic function.
Equation in option 2 satisfies all the conditions of quadratic function, hence it is the quadratic function.
The point-slope form: 
m = -1; (2; 4)
subtitute
y - 2 = -1(x - 4)
m = -1; (2; 4)
subtitute
y - 2 = -1(x - 4)