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pochemuha
3 years ago
7

Write an equation that represents the line. (Use exact numbers)

Mathematics
2 answers:
zhannawk [14.2K]3 years ago
8 0
Y=3\4+2

Slope=rise/run. 3\4
Y-intercept = 2
Alecsey [184]3 years ago
6 0

Answer <u>(assuming it can be in slope-intercept form)</u>:

y = \frac{3}{4} x+2

Step-by-step explanation:

When knowing the y-intercept and a slope of a line, you can write its equation in slope-intercept form, or y = mx + b format.  

1) First, find the slope. Use two points from the graph. We can see that the points (0,2) and (4,5) are on the line, therefore substitute their x and y values into the slope formula m = \frac{y_2-y_1}{x_2-x_1} and solve:

m = \frac{(5)-(2)}{(4)-(0)} \\m = \frac{5-2}{4-0} \\m = \frac{3}{4}

Thus, the slope is \frac{3}{4}.

2) Next, find the y-intercept of the line by looking at the graph. The y-intercept is the point at which the line intersects the y-axis. By reading the graph, we can see that that point is (0,2), thus 2 is the y-intercept.

3) Now, using the slope-intercept formula y = mx + b, substitute the found values for the m  and the b to write the equation of the line.

Since m represents the slope, substitute \frac{3}{4} in its place. Since b represents the y-intercept, substitute 2 in its place. This gives the following answer and equation:

y = \frac{3}{4} x+2

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There is 5000 ml water in a fish tank. THen 20% water is evaporated per week. calculate the volume of water left after 4 Weeks.
LenaWriter [7]

Answer:

The answer to your question is: V = 2048 ml

Step-by-step explanation:

Data

Volume = 5000 ml

20% is evaporated per week

Volume of water left after 4 weeks = ?

Process

            1st week               5000 ml   -----------------  100 %

                                              x          -----------------      20 %

                                              x = (20x 5000) / 100

                                              x = 1000 ml

After a week there are = 5000 - 1000 = 4000 ml left

            2nd week              4000 ml   ----------------  100 %

                                                x          ----------------   20%

                                               x = 800 ml

After two weeks, there are = 4000 - 800 = 3200 ml left

         third weeks              3200 ml  -----------------  100 %

                                              x         ------------------    20%

                                             x = 640 ml

After three weeks there are 3200 - 640 = 2560 ml left

           

         4rd                             2560 ml  ----------------- 100%

                                                x           ----------------  20%

                                             x = 512 ml

After four weeks there are 2560 - 512 = 2048 ml left

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