Find the slope of the line graphed below.
2 answers:
There are two ways you could calculate slope.
The first is using two points on the line. Plug the coordinates into the formula:
y₁ - y₂ / x₁ - x₂
This is the difference in rise divided by the difference in run, or rise/run. Our marked coordinates are (-2, -3) and (0, 1).
y₁ - y₂ / x₁ - x₂
-3 - 1 / -2 - 0
-4 / -2
2
The second method is much faster: Look at the graph; count the amount of units the graph rises and the amount of units the graph runs, then divide the former number by the latter number (see attachment).
4 / 2 = 2
Answer:
Slope = 2
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The diameter of the tank = 9 feet
So radius is = feet
Height of the tank = 25 feet
The top of the tank must be circular with same radius as 4.5 feet
So, to calculate the area of the tank and top, we will add the curved or lateral surface area of tank and area of circle
Curved or lateral Surface area of cylindrical area = 2*PI*r*h
= = 706.50 square feet
And area of the circular top = PI*r²
= = 63.585 square feet
So, total area that will be painted = = 770.085 square feet
Or rounding up to 2 decimal places = 770.09 square feet.