Javion is trying to graph the rational function f(x)=x−4x+3 but is unsure where he should place the asymptotes and the zero for the function. Marissa laid out a chart to help him. Complete the chart below to determine what numbers should be placed in the blanks of the chart.

Asymptotes or Zeros Number
Horizontal Asymptote: y = ___
Vertical Asymptote: x = ___
Zero: ___

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.