The general slope-intercept equation of a line is y=mx+b where m is the slope and b represents the y intercept. y and x are simply a point the line passes through. In this case, y=x-5, meaning m=1 and b=-5.

In order to find the perpendicular slope, we should take the current slope's negative reciprocal. We have:

$-\frac{1}{1} =\\-1$

Therefore, our perpendicular slope is -1. We now have equation:

$y=-x+b$

We can plug in the known values of the point (-1,4) to solve for b.

$4=(-1)*(-1)+b\\4=1+b\\b=3$

If we now put what we found together, we have equation

$y=-x+3$

I hope this helps! Let me know if you have any further questions :)

7 0

2 years ago

You use your mobile phone to phone home every day. It cost £15 per moth and £0.18 per minute for phone calls. how much will you

suter [353]

0.18x420= 75.6+15.00=90.6

7 0

2 years ago