Consider the linear equation y = 5 + 4x1 − 3x2. a. At what y-value does it intersect the y-axis? b. At what x1- and x2-values does it intersect the y-axis? c. What are the partial slopes? d. By how much will the y-value on the plane change when x1 increases by 1 unit and x2 remains unchanged? e. By how much will the y-value on the plane change when x2 decreases by 2 units and x1 remains unchanged?

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter1: Equations And Graphs
Section1.3: Lines
Problem 92E
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Consider the linear equation y = 5 + 4x1 − 3x2.

a. At what y-value does it intersect the y-axis?

b. At what x1- and x2-values does it intersect the y-axis?

c. What are the partial slopes?

d. By how much will the y-value on the plane change when x1 increases by 1 unit and x2 remains unchanged?

e. By how much will the y-value on the plane change when x2 decreases by 2 units and x1 remains unchanged?

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