Question

HELP PLZ What is the equation of the given line in standard form? Use integer coefficients.



y = -6.9x + 5.1

A. -69x + 10y = 51
B. 69x + 10y = -51
C. -69x + 10y = -51
D. 69x + 10y = 51

Answer 1

move -6.9x to the other side and multiply the whole thing by ten, you should see the answer :)

Answer 2

What all the answers have in common is that they multiplied everything by 10.
So let's do that:
10y = -69x + 51

Then we want to move the x and y terms to one side. We do this by adding 69x to both sides:
10y + 69x = -69x +69x + 51
(The two 69x terms on the right cancel out, something - itself is naturally 0)
10y + 69x = 51

Switch the x and y terms around:
69x + 10y = 51

The answer is D.

Answer 3

great explaining @IAmSinged! thank you both :) mind helping with a couple more?

Answer 4

Go ahead and post them.

Answer 5

okay ty :)

Answer 6

@alias @IAmSinged

Answer 7

which one pass the vertical line test? Do you know what the test is?

Answer 8

if you don't, just run a ruler (or anything straight) vertically through the graph, and if it hits two or more points, then it fail

Answer 9

B

Answer 10

Confirming B fails.

Answer 11

:S

Answer 12

hmm D @alias

Answer 13

yup, last one is right :)

Answer 14

yayy! :D

Answer 15

if you notice, for b, when you move in the line, you have infinite number of points, so that violate the vertical line test