Write the equation of the line that passes through the points (0, -6) and (-4, 0).
show how you arrived at your answer.
what would be the equation? i’m confused. .

The slope is -3/2.

Step-by-step explanation:

Hint: slope formula:

y=(-3/2)x+-6

or

y=(-3/2)x-6

Step-by-step explanation:

We are going to use slope-intercept form to find the equation for this line.

y=mx+b is slope-intercept form where m is the slope and b is the y-intercept.

y-intercept means where it crosses the y-axis; the x will be 0 here.  Look the question gives us the y-intercept which is -6.

So we already know b which is -6.

y=mx+-6  

Instead of finding the slope using the slope formula which you could.

I'm going to plug in the point (-4,0) into y=mx+-6 to find m.

So replace x with -4 and y with 0 giving you:

0=m(-4)+-6

0=-4m-6

Add 6 on both sides:

6=-4m

Divide both sides by -4:

6/-4=m

Reduce the fraction:

-3/2=m

The slope is -3/2.

Again you could use the slope formula which says .

This is the same thing as lining the points up vertically and subtracting the points vertically then putting 2nd difference over first difference.  Like this:

(  0   , -6)

-( -4  ,   0)

---------------

  4        -6

The slope is -6/4 which is what we got doing it the other way.  

So the equation with m=-3/2 and b=-6 in y=mx+b form is

y=(-3/2)x+-6

or

y=(-3/2)x-6

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m