ACT Math 3.3 Coordinate Geometry

ACT Math: Coordinate Geometry Drill 3, Problem 3. What is the standard form equation for the line?

ACT Math	Coordinate Geometry
ACT Mathematics	Coordinate Geometry
Algebra	Coordinates and Graphs
Coordinate Geometry	Graphs of points, lines, polynomials, and circles Slope The relations between equations and graphs
Foreign Language	Arabic Subtitled Chinese Subtitled Korean Subtitled Spanish Subtitled
Geometry	Coordinate Geometry
Language	English Language
Product Type	ACT Math

00:23

and its -1/2. Already we can fill in the equation to be Y equals -1/2 X plus B.

00:30

Well the question gives us one point the line is going to intersect

00:34

and we know that the slope is gonna be gently negatively sloping

00:38

at minus a half. So rewrite the equation to be one equals -1/2

00:43

times 3/4 plus B. Then just solve and we have one

00:48

equals -3/8 plus B. Add 3/8 to both sides

00:53

and we have 1 3/8 equals B. Glance at the potential answers and we see that there

00:59

is no 1 3/8, but there is an 11/8.

01:02

So that's the form they want this thing in and now we can write the equation as

01:06

Y equals -1/2 X plus 11/8 and the answer is D.