The domain is the set of numbers that the x value can be.
In an equation like
the domain is all real numbers because x can be any number.
In the case of
, any x value that is less than or equal to -4 will not work because you would be taking the square root of a negative number, which doesn't work unless you're graphing on a complex plane, which I assume you aren't.
Thus, the domain is
I hope that helps!
Line of best fit also known as a linear regression or a trend line, the line of best fit is common tool for showing how two variables are related.This can be established by:
Positive correlation
all scatter plots
negative correlation
Line of best fit is used in order to demonstrate any observed trends in order to predict future outcomes regarding the data point variable in use.
Answer:
Number = 36
Step-by-step explanation:
Given that,
A number twice of which decreased by 7 gives 65.
Let the number be x.
Twice of the number is 2x.
ATQ,
2x - 7 = 65
We can solve the above equation.
Adding 7 both sides.
2x-7+7 = 65 +7
2x = 72
x = 36
So, the required number is 36.
Irrational means of a number, quantity, or expression NOT expressible as a ratio of two integers, and having an infinite and nonrecurring expansion when expessed as a decimal. Rational numbers mean any number that CAN be expressed as the quotient or fraction of two integers, a numerator, a non-zero denominator. For example, any repeating or terminating decimal represents a rational number.
