Question

Write the equation of the line that passes through (3, 6) and (0, –3) in slope-intercept form.

y = 3x – 6

y = 3x – 3

y = 3x + 3

y = 3x + 6

Answer 1

what would you say is the slope of THAT line?

Answer 2

y=mx+c is the formula to use .....
m=y2-y1/x2-x1

Answer 3

for c /.... compare ....\[m=\frac{ y-c }{ x-o }-----with ------m=\frac{ y2-y1 }{x2-x1}\]

Answer 4

so the answer is c?

Answer 5

hmmm ....

Answer 6

lets find the slope...
slope(m) = (y2 - y1) / (x2 - x1)
set 1 (3,6) set 2 (0,-3)
Now lets sub it in...
m = (-3 - 6) / (0 - 3)
m = - 9/-3
m = 3 (remember when dividing 2 negatives it equals a positive)
so now we know the slope is 3
Now we will use this formula, y = mx + b.....using 3 as slope m and either of the points.....I will use (3,6)
now lets sub...
6 = 3(3) + b --(we are solving for b, the y intercept)
6 = 9 + b
6 - 9 = b
- 3 = b

so your equation is : y = 3x - 3