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Answer:
y = x + 7
Explanation:
The line has a "rise" of 1 grid square for each "run" of 1 grid square to the right. (It passes through successive grid intersections.) This means it has a slope of ...
m = slope = "rise"/"run" = 1/1
m = 1
The line crosses the y-axis at y = 7, so the y-intercept is ...
b = 7
Then the slope-intercept form equation is ...
y = mx + b
y = x + 7