What would be the slope formula using point (1,2) and (0,4)??

Question

I have to find the slope and intersect i dont get it at all

 

Answer 1

slope is figured out by this formula:

 

(y₂  - y1)/(x₂ - x₁)

 

(4 - 2)/(0 - 1) = - 2

 

so slope is  -2.

 

I assume you want the y-intercept. It's 4 because the x-value of a y-intercept is 0.

 

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to figure out slope we need two points: (-4,2) and (1,0)

I have given you the formula above, so plug the two points in to the formula:

 

 0 - 2/1 -(-4) = -2/5

 

so, -2/5 is slope.

 

let's use y - y₁ = m(x - x₁) to figure out y-intercept. we can use either point:

 

y - 0= -2/5(x - 1)

 

y = (-2/5)x + 2/5

 

the above equation is in y = mx + b form which 'b' equals the y-intercept:

b = 2/5