Slope Intercept Form Calculator

Evaluate y = mx + b and find roots and intercepts.

y at given x 2

x-intercept 2

Formula: y = mx + b ; x-intercept = −b/m

Step-by-step with your numbers:

1. Values used:

2. Slope m = 2

3. y-intercept b = -4

4. x value = 3

6. y at given x = 2

7. x-intercept = 2

Did we solve your problem today?

Slope-intercept form y = mx + b is the most common way to write a line.

The math behind it

m is the slope (rise over run) and b is where the line crosses the y-axis. The x-intercept is −b/m.

y = 2x − 4 at x = 3 → y = 2; x-intercept = 2.

What does b represent?

The y-value where the line crosses the y-axis (when x = 0).