What is the value of such that the line is parallel to the line ?
Answer and explanation
Correct answer: C.
- Step 1: Find the slope of : , so the slope is .
- Step 2: Find the slope of : , so .
- Step 3: For the lines to be parallel, their slopes must be equal: .
- Step 4: Solve for : .
Answer
.
Why not the others: '' misses the negative sign when rearranging to slope-intercept form; '' multiplies 2 by instead of dividing; '' sets .
Practise more Algebra, Equations and Coordinate Geometry.
Free questions with an explanation for every one, and full timed EmSAT Achieve (UAE) mock tests.