Finding Gradient: Tips & Techniques

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In summary, the given area is a trapezoid with a height of 5 units and a little base of 2 units. We can use the formula for the area of a trapezoid to solve for the big base, which is found to be 5 units. The equation of the line representing the area is \(y=\dfrac{3}{5}x+2\).
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Yazan975
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  • #2
What type of plane figure is the given area?
 
  • #3
MarkFL said:
What type of plane figure is the given area?

It does not specify
 
  • #4
Yazan975 said:
It does not specify

We can see that it is a trapezoid. A formula for the area \(A\) of a trapezoid is:

\(\displaystyle A=\frac{h}{2}(B+b)\)

where:

\(\displaystyle h\) is the height (we see is is 5 units)

\(\displaystyle B\) is the "big base" (this is unknown)

\(\displaystyle b\) is the "little base" (we see this is 2 units)

So, plugging everything we know into the area formula, we obtain:

\(\displaystyle \frac{35}{2}=\frac{5}{2}(B+2)\)

Solve this for \(B\)...what do you get?
 
  • #5
MarkFL said:
We can see that it is a trapezoid. A formula for the area \(A\) of a trapezoid is:

\(\displaystyle A=\frac{h}{2}(B+b)\)

where:

\(\displaystyle h\) is the height (we see is is 5 units)

\(\displaystyle B\) is the "big base" (this is unknown)

\(\displaystyle b\) is the "little base" (we see this is 2 units)

So, plugging everything we know into the area formula, we obtain:

\(\displaystyle \frac{35}{2}=\frac{5}{2}(B+2)\)

Solve this for \(B\)...what do you get?

Thanks! Big help. I got the answer
 
  • #6
Yazan975 said:
Thanks! Big help. I got the answer

For the benefit of others who may read this thread, I will complete the problem. This will make the thread more useful (hint hint).

I posted:

\(\displaystyle \frac{35}{2}=\frac{5}{2}(B+2)\)

Multiply through by \(\dfrac{2}{5}\):

\(\displaystyle 7=B+2\)

Subtract through by 2 and arrange as:

\(\displaystyle B=5\)

From this, we may conclude that the point \((5,5)\) is on the line, and we also know \((0,2)\) is on the line (the \(y\)-intercept), and so the slope \(m\) of the line is:

\(\displaystyle m=\frac{5-2}{5-0}=\frac{3}{5}\)

Armed with the slope and intercept, we may give the equation of the line as:

\(\displaystyle y=\frac{3}{5}x+2\)
 

FAQ: Finding Gradient: Tips & Techniques

1. What is gradient in science?

Gradient in science refers to the rate of change of a physical quantity with respect to another quantity. It is a measure of how steep or gradual a change is over a given distance or time.

2. How is gradient calculated?

Gradient is calculated by taking the change in the value of a quantity divided by the change in the corresponding quantity. This can be represented as rise over run, or the change in y divided by the change in x. In mathematics, it is denoted as Δy/Δx.

3. What is the importance of finding gradient?

Finding gradient is important in many scientific fields, such as physics, biology, and chemistry. It allows us to understand and analyze the rate of change of a physical quantity, which can help us make predictions, solve problems, and create models.

4. What are some techniques for finding gradient?

One technique for finding gradient is using the slope formula, which involves selecting two points on a graph and calculating the rise over run between them. Another technique is using the derivative, which is a mathematical tool for finding the rate of change of a function at a specific point.

5. Are there any tips for finding gradient accurately?

One tip for finding gradient accurately is to use multiple data points instead of just two. This can provide a more accurate representation of the rate of change. It is also important to understand the units of the quantities involved and make sure they are consistent in order to avoid errors in calculation.

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