# Chapter 2 - 2.1 - Linear Equations in Two Variables - 2.1 Exercises - Page 170: 66

Neither

#### Work Step by Step

The slope is critical when determining if lines are parallel, perpendicular, or neither. Since the equations are given in point slope form (y = mx + b), the slope will be the value of m. In this example, the lines and slopes are: $y_{1}$ = $\frac{1}{4}$x - 1 where m = $\frac{1}{4}$ $y_{2}$ = 4x + 7 where m = 4 If the slopes of the two lines are the same, then the lines are parallel. If the slopes of the two lines are negative reciprocals, then the lines are perpendicular. Using this rule, the two lines are neither parallel or perpendicular since $\frac{1}{4}$ $\ne$ 4 and while the two are reciprocals they are not negative reciprocals.

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