McGraw Hill Glencoe Algebra 2, 2012
MH
McGraw Hill Glencoe Algebra 2, 2012 View details
Standardized Test Practice

Exercise 4 Page 868

What do parallel lines have in common?

J

Practice makes perfect

Consider the given equation of a line. y - 2 = 4(x + 1)To help us identify the slope of this line, let's first convert it into slope-intercept form, y= mx+ b, where m is the slope and (0, b) is the y-intercept.

y - 2 = 4(x + 1)
â–¼
Solve for y
y = 4(x + 1) + 2
y = 4x + 4 + 2
y = 4x + 6

With this, we can more easily identify the slope m and y-intercept b. y= 4x+ 6 When lines are parallel, they have the same slope. Because of this, we know that all lines that are parallel to the line whose equation is given will have a slope of 4. This corresponds to option J.