Final answer:
The equation of line d is y = (-1/10)x - 3/10.
Step-by-step explanation:
To find the equation of line d, which is parallel to line c, we need to use the same slope as line c. The slope of line c is -1/10, so the slope of line d will also be -1/10. Since line d passes through the point (7, -1), we can use the point-slope form of a linear equation to find the equation of line d.
Using the point-slope form, we have: y - y1 = m(x - x1)
Substituting the values, we get: y - (-1) = (-1/10)(x - 7)
Simplifying, we have: y + 1 = (-1/10)x + 7/10
To write the equation in slope-intercept form, we can isolate y by subtracting 1 from both sides, yielding: y = (-1/10)x + 7/10 - 1. Simplifying further, we get: y = (-1/10)x - 3/10