The point-slope form:

m - slope
(x₁, y₁) - the point
The formula of a slope:

We have the points (5, 4) and (2, -2). Substitute:

- point-slope form
add 4 to both sides
- slope-intercept form
subtract 2x from both sides
change the signs
- standard form
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From the table we have two points (1, 3) and (2, 7). SubstituteL

- point-slope form
add 3 to both sides
- slope-intercept form
subtract 4x from both sides
change the signs
- standard form