Answer:
15) slope=-4 y-intercept is 3 equation is y=-4x+3
16) slope=0 y-intercept is -4 equation is y=0x-4
17) slope=2 y-intercept is 4 equation is y=2x+4
18) slope=1 y-intercept is 4 equation is y=1x+4
Step-by-step explanation:
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