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January 28, 2015

January 28, 2015

Posted by **Mego** on Sunday, February 20, 2011 at 7:52am.

- maths -
**Helper**, Sunday, February 20, 2011 at 10:02ampoints (3,6) and (-5,-2)

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

m = (-2 - 6)/(-5 - 3)

m = -8/-8 = 1

Slope-intercept form of the equation,

y = mx + b,

where m = slope and b = y-intercept

To find the y-intercept, Use either point to substitute into the equation,

y = mx + b

P (3,6), m = 1

y = mx + b

6 = 1(3) + b

6 = 3 + b

b = 3

Therefore, the equation where m = 1 and b = 3 is,

y = 1x + 3

y = x + 3

- maths -
**Mego**, Sunday, February 27, 2011 at 10:51amThanks!

- maths -
**Mego**, Sunday, February 27, 2011 at 11:28amThanks! I'm covering maths classes so it's annoying not knowing how to explain and mark work

we are trying to find out how to use the equation to determine whether or not the point (-3,2) lies on this line?

the x-intercept and the y-intercept of the line in the first question and the kids have to show each step of their method clearly.

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