Answer:
0.375
Step-by-step explanation:
Answer:
He should have found 8 as the exponent, not –8.
Step-by-step explanation:
im doing a unit test
Regression line is given in the form of: y = a + bx
Where b is the gradient
Working out 'b'


Σxy - [ΣxΣy]/N

Σx² - [Σx]²/N



Working out 'a'
a = [∑y/N] - b[∑x/N]
a = [2650/460] - 0.264[3920/460]
a = 5.86 - 2.25
a = 3.61
Regression line equation is
y = 3.61 + 0.264x
The discriminant of a quadratic equation is useful in determining the nature of its roots. Further, it can be solved by the equation,
D = b² - 4ac
From the given equation, b = 3, a = 2, and c = -5. Substituting the given to the equation,
D = 3² - (4)(2)(-5) = 49
Thus, the answer is the fourth choice, 49.
Answer:
(-∞,1)
Step-by-step explanation: