Mathematics, 06.07.2019 00:30, shanua
Suppose y varies directly with x. if y = -4 when x = 8, what is the equation of direct variation?
complete the steps to write the equation of direct variation.
1. start with the equation of direct variation y = kx.
2. substitute in the given values for x and y to get
3. solve fork to get
4. write the direct variation equation with the value found for k. the equation is
Answers: 2
![\bf \qquad \qquad \textit{direct proportional variation} \\\\ \textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby \begin{array}{llll} k=constant\ of\\ \qquad variation \end{array} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \textit{we also know that }~~ \begin{cases} y=-4\\ x=8 \end{cases}\implies -4=k(8)\implies \cfrac{-4}{8}=k\implies -\cfrac{1}{2}=k \\\\[-0.35em] ~\dotfill\\\\ ~\hfill y=-\cfrac{1}{2}x~\hfill](/tpl/images/0055/9519/ba2e4.png)
Other questions on the subject: Mathematics
Mathematics, 21.06.2019 16:10, GgRed
Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.
Answers: 1
Mathematics, 21.06.2019 18:30, 987654321156
The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?
Answers: 1
Mathematics, 21.06.2019 21:30, justkevin1231
The domain of a function can be represented by which one of the following options? o a. a set of output values o b. a set of f(x) values o c. a set of input values o d. a set of both input and output values
Answers: 3
Mathematics, 21.06.2019 23:30, olivialaine31
Will give brainliest for correct answer 8. use the distance time graph to answer these questions: a. what does the graph tell us about the velocity of the car? b. what is the average velocity of the car? (show work) c. is the velocity reflected in the graph positive or negative?d. is there any point on the graph where the car is not moving? how do we know?
Answers: 1
Do you know the correct answer?
Suppose y varies directly with x. if y = -4 when x = 8, what is the equation of direct variation?
Questions in other subjects:
Social Studies, 22.10.2019 21:10
Mathematics, 22.10.2019 21:10
Mathematics, 22.10.2019 21:10
