the y-intercept is B in mx+b. The y-intercept is crucial to an equation. The y is how much something cost or where it starts at zero on the x intercept.
FINDING Y
First the slope. To find slop you subtract x from x and y from y.
example: (2,4) (5,6) 2-5=(-3) 4-6=(-2) the slope would be y/x so -2/-3
the slope here would be -2/-3
the points are different but the slope is the same
the y intercept is 3; that is where the line crosses the y axis
- find slope
- find y intercept
- make an equation
Answer key
2/3
5
y=.666+5
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