Answer:
see below
Step-by-step explanation:
domain is all x values for which a graph has
and range is all y values for which a graph has
domain in this case is -4<x<4. The range is -3<= x <= 3
Function is increasing when slope of the line is positive, function is decreasing when slope of the line is negative.
When 2 lines meet and there is an edge like at (-1,3) there is no increase of decrease of the function. If you are in calculus, this is because the derivative of the function will not be valid at those points. If you are not in calculus, then don't pay attention to the derivative stuff.
Function is increasing on interval -4<x<-1 and 2<x<4
Function is decreasing on interval -1<x<2
Step-by-step explanation:
First you have to find the slope
2/3 - 4/-2 = -2/5
Now you have the slope, substitude in one of the ordered pair to find the y int ((y = mx + b) form, b is y int)
(3) = -2/5(2) + b
3 = -4/5 + b
b = 19/5
Now with both of the slope and y int, you can write the equation in y int form
y = -2/5x + 19/5
$84
$160 * 0.30 = $48
$160 - $48 = $112
$112. * 0.25 = $28
$112 - $28 = $84
Use what you know.
Guitar cost =$160 w/ 30% off
30% = 30/100 = 0.30.
30% off means 30% of the price $160 will be taken off so that is why I multiplied 160 by 0.30 (30/100).
30% of 160 is 48 so I subtracted 48 from 160 which equals $112.
With an extra 25% off I repeated the same steps above.
25/100 = 0.25
$112 * 0.25= $28
$112 - $28 = $84
If you need me to break it down more just let me know. I HOPE THIS HELPS
This looks like a parabola so:
y=x^2 - 20x + 15 --> x^2 - 20x +15=y
(x^2 -20x)=y - 15 --> (x - 10)^2=y - 15 +100 ( used complete the square)
(x - 10)^2=y + 85