Q:

Which graph represents a line with a slope of -2/3and a y-intercept equal to that of the line y=2/3x-2

Accepted Solution

A:
Answer:[tex]y=-\frac{2}{3} x-2[/tex]Step-by-step explanation:the general equation for a line is: [tex]y=mx+b[/tex]where [tex]m[/tex] is the slope of the line, and [tex]b[/tex] is the y-intercept. Since we need a slope of -2/3:[tex]m=-\frac{2}{3}[/tex], So far we have that the line must have the equation:[tex]y=-\frac{2}{3} x+b[/tex]the graph of a line with a negative slope is one that "falls" from left to right in the plane. And the number [tex]\frac{2}{3}[/tex] means that it falls at a ratio of 2 units in the y-axis for every 3 in the x-axis. we are told that the y-intercept is that of the line: [tex]y=\frac{2}{3} x-2[/tex] --> here the y-intercept is -2. Thus the equation of the line we are looking for is:[tex]y=-\frac{2}{3} x-2[/tex]which means that this line crosses the y-axis at -2, and the graph is the one in the attached image.