Convert between point-slope form, slope-intercept form, and evaluation at a chosen x-value.
Last updated: June 2026 | By Patchworkr Team
Point-slope form anchors a line using one point and one slope. From that, we can derive the y-intercept and standard form.
With point (1, 2) and slope 3, the equation is y - 2 = 3(x - 1), which simplifies to y = 3x - 1.
Can I enter just m and b?
Yes. If b is present, the calculator uses it directly.
Can I evaluate a y-value?
Yes, switch to Evaluate mode and enter x.
Does blank input count as zero?
No. Blank input is treated as missing, not zero.
What if the slope is zero?
The line is horizontal and y stays constant.
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