what is the equation for the line that passes through points (-1,-4) and (1,4)? write the equation in slope-intercept form.

Question

anonymous · Answer

@StudyGurl14 @3spooky5me @Catlover5925 @Here_to_Help15 @perl

anonymous · Answer

@invinceble @Monster1234 @Owlfred @Zarkon

studygurl14 · Answer

Use the slope formula:
Where points $(x_1,y_1)$ and $(x_2,y_2)$ are on the same line...

$\large slope=\Large\frac{y_2-y_2}{x_2-x_1}$

anonymous · Answer

slope=4 @StudyGurl14

studygurl14 · Answer

Correct. good job. :)

studygurl14 · Answer

Slope-intercept form:
y= mx+b
where m =slope
So...
 y= 4x + b

You need to find the value of b. Do that by plugging in one of the coords into the equation and solving. Remember that (x,y)

anonymous · Answer

so y=4x+b
y=4 times 1 +4 is the equation @StudyGurl14

studygurl14 · Answer

no..not quite
Using point (1,4)
$\large y=4x+ b\rightarrow (4) = 4(1) + b \rightarrow 4 = 4 + b\rightarrow b=0$
So...
the equation is $\large y=4x$

anonymous · Answer

ok i get it now bc i looked it up so thanks

studygurl14 · Answer

You're welcome. :)