Question

]Choose the equation of the line passing through the point (-1, -2) and perpendicular to y =1/4 x + 2.

y = 4x - 6

y = -4x - 6

y = -4x + 2

y = 4x

Answer 1

in order to be perpendicular than you invert m and multiply by -1

by m I mean the m in y=mx+b your equation is already in this mode so m is 1/4

invert it and multiply by -1, then it is - 4/1

Answer 2

so now if you want it to pass thru -1,-2 plug it into y=mx+b
-2=-4/1*-1+b solve for b and b =-6

therfore y=-4/1-6

Answer 3

thanks

Answer 4

how bout this.


Which of the following is the slope between the points (0, -10) and (-4, 0)?

2/5

-2/5

-5/2

5/2

Answer 5

slope is (y2-y1)/(x2-x1)=(0+10)/(-4)=-10/4

-5/2

Answer 6

thanks how about this .
]Which of the following is the slope between the points (-1, -5) and (7, -3)?

4

1/4

-1/4

-4

Answer 7

1/4 is the slope

Answer 8

slope is (y2-y1)/(x2-x1)=(-3-(-5))/(7-(-1))

Answer 9

the formula used by timo86m gives the solution

Answer 10

slope is (y2-y1)/(x2-x1)
most times it is written slope is (yf-yi)/(xf-xi)

the f and i means final and initial.

Answer 11

its easier to remember that final- initial