Question

which equation represents the line passing through the points (1,1) (-2,13)? PLEASE HELP!

Answer 1

did you find the slope?

Answer 2

no I haven't but I know how to I jusr don't know the formula by heart

Answer 3

it is "the change in y over the change in x" or as a formula
\[\frac{y_2-y_1}{x_2-x_1}\] replace \(y_2\) by \(13\), \(y_1\) by \(1\), \(x_2\) by \(-2\) and \(x_1\) by \(1\)

Answer 4

so -4?

Answer 5

hello?

Answer 6

-4 is the slope

Answer 7

ya I know but I don't know what to do next..thank you for replying

Answer 8

you have to replace one of the points in the equation..
The equation have the next form: \[\frac{ y _{2}-y _{1} }{x _{2}-x _{1}}=m \]
\[\frac{ y _{2}-1 }{x _{2}-1}=-4\]

Answer 9

clearing .. the equation of this is y=-4x+5

Answer 10

thank for your help!

Answer 11

that's not answer on my choices

Answer 12

which are your choices?

Answer 13

4x-y=5
x-4y+5
x+4y=5
4x+y=5

Answer 14

you have to move "4x" to the other member of the equation
y+4x=5 . The last choice

Answer 15

ohh ok...thank you!!