Uhlt test
1 answer:
Answer:
Answer:
The y-intercept is -21. The x-intercept is -10.5 or .
(0, -21) and (-10.5, 0)
Step-by-step explanation:
To find the y-intercept, you would plug in 0 for x.
y = -2x - 21
y = -2(0) - 21
y = 0 - 21
y = -21
The y-intercept is -21.
To find the x-intercept, you would plug in 0 for y.
y = -2x - 21
0 = -2x - 21
2x = -21
x = -21/2
x = -10.5 or
The x-intercept is -10.5 or .
You might be interested in
Answer:
the inflection points are
So,
It is concave down at the intervals
And it would be concave up at
Step-by-step explanation:
Remember that to find inflection points you need to find where
Since
Then using the product and the chain rule you have that
And then, using again the chain rule and the product rule you have that
Therefore you have to solve the equation
Using the quadratic equation you get that there are two solutions, so the inflection points are
So,
Now remember that a function is concave up if the derivative is greater than zero and concave down if the derivative is less than zero. Therefor you have to solve these inequalties
And you would get that is concave down at the intervals
And it would be concave up at