Question

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Write an equation in slope-intercept form for an equation of a line perpendicular to y = 1/2x that intersects at point (-2, 3).


y = -2x – 1

y = 2x + 7

y = 2x + 3

y = -2x +1

Answer 1

The slope of a perpendicular line is the reciprocal of the current slope, which in this case would be -2 because 1/2 flips and becomes negative. Now to find your point, input -2 into the two possible answers left and see which gives you 3.

Answer 2

so which one do u think it is?

Answer 3

I know which it is, you only have one step left, input the x and y values to see what is correct.

Answer 4

i dont understand this its confusing to me!!!!

Answer 5

(-2, 3) is a point, which represents x = -2 and y = 3. The reciprocal of the slope 1/2 is -2, thus eliminating b and c. Find the answer by entering -2 in for x and 3 in for y into your remaining answers and solve to see if it is true.

Answer 6

ok so i got y=-2+1 is that rite?

Answer 7

No, do y=-2(-2)+1 and tell me what you get.

Answer 8

i got y=5

Answer 9

So this tells you that the equation you picked is not correct because 3 does not equal 5

Answer 10

ok so which one of the choices is rite?

Answer 11

I'm not going to give you the answer, do the same thing you did for the other equation possible.