Need for solving for a radical function

Graph the following points: (-4, 0), (-3, 2), (0, 4)

Domain:

Range:

Step-by-step explanation:

The parent function of is . The 2 on the outside of the square root tells us that the parent graph will undergo a vertical stretch of 2. The +4 is really -(-4) so it is a negative four, therefore the parent function will horizontally shift to the left by 4 units.

Start by creating a t-chart with a few points from the parent function, , on the left side then on the right side you'll transform the points from the parent function.

The left side of the t-chart should have the following points:

Notice how there are no negative x-values because this is a square root function, and you cannot take the root of a negative number (it would be imaginary and not graphable in this kind of graph).

The right side of the t-chart should have the following points:

I got these points by multiplying the y-values by the vertical stretch, 2, and subtracting 4 from the x-values to accomplish the horizontal stretch.

Note that everything outside of the "parentheses" (square root incl.) would be a vertical stretch/compression/shift, and everything inside the "parentheses" would be a horizontal stretch/compression/shift.

To solve your problem you would graph the right side of the t-chart because that is the transformed parent function.

Now for the domain and range:

The domain of the parent square root function is always going to be . If you think about it, it makes sense since you cannot use any x-values less than 0 otherwise you'd come up with an imaginary number.

However, since this square root function is horizontally shifted 4 units to the left, the domain would start at -4. So the domain for this graph is: .

The range is the same; when you take the square root of a positive number you will not get a negative number. Therefore the range is also .

I've attached a picture of what the graph should look like.

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.

x/3-10=8

x/3=18

x=48