How do I find the y-intercept and slope ?

Question

asked Apr 22, 2019 31.4k views

1 Answer

Davegson · Answer 1 · 2019-04-27T20:02:30+0000

Slope-intercept form:

y = mx + b

"m" is the slope, "b" is the y-intercept (the y value when x = 0)

You need to find "m" and "b".

In the table, when x = 0, y is 0, so the y-intercept is 0

y = mx + 0 or y = mx

To find "m", you can use the slope formula and plug in 2 points:

(0,0) and (1, 3)

m=(y_(2)-y_(1))/(x_(2)-x_(1))

m=(3-0)/(1-0)

m = 3

Slope: 3

y-intercept: 0

Equation: y = 3x