Question

Line MN passes through points M(4, 3) and N(7, 12). If the equation of the line is written in slope-intercept form, y = mx + b, what is the value of b?

Answer 1

So first you would do y-y over x-x so it would be 3-12 over 4-7 which equals -9/3 so which is -3
You now plug it into y-3= -3(x-4) which equals y=-3x+15 so your b=15

Answer 2

Answer: b=1

Explanation

Vertical difference “y”

Y2-Y1= 7-3=4

Horizontal difference

x2-x1=12-4=8

Slope is =(y2-y1)/(x2-x1)

M=4/8= 1/2

3=1/2(4)+b

3=2+b

b=3-2

B=1