Use the slope-intercept form of the linear equation to write the equation of each line with the given slope and y-intercept.
7. Slope -1; y-intercept (0, 1)
8. Slope 1/2; y-intercept (0, -6)
9. Slope 2; y-intercept (0, 3/4)
10. Slope -3; y-intercept (0, -1/5)
11. Slope 2/7; y-intercept (0, 0)
12. Slope -4/5; y-intercept (0,0)
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