let's recall the vertical line test, if a vertical line hits the graph or points twice, then is NOT a function. Check the picture below.
Which answer is the best estimate of the correlation coefficient for the variables in the scatter plot?
2 answers:
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Answer:
Positive nonlinear association
Step-by-step explanation:
The correlation coefficient is fairly low at 0.28, so there is a positive association, but it is definitely not linear.
(It may not be fair to call it non-linear, either. There seems to be no specific value of correlation coefficient below which you declare there to be "no association.")
Answer:
x = 4 or x = -3/2
Step-by-step explanation:
To simplify and solve this, let's use the quadratic formula.
So the format of a quadratic equation is supposed look like this:
Let's find a, b, c:
- a is the coefficient of x^2
- b is the coefficient of x
- c is the constant term
Now let's solve the equation.
Let's solve your equation step-by-step.
2x^2−5x−12=0
For this equation: a=2, b=-5, c=-12
2x^2+−5x+−12=0
Step 1: Use quadratic formula with a=2, b=-5, c=-12.
or
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<u>Answer:</u>
x = 4 or x = -3/2