OG详解-OG3 数学2 Q11

Choice B is correct. The line of best fit shown intersects they-axis at a positive y-value and has a negative slope. The graph of an equation of the form  y = a+bx, where a and b are constants, intersects the y-axis at a y-value of a and has a slope of b. Of the given choices, only choice B represents a line that intersects they-axis at a positive y-value, 13.5, and has a negative slope, -0.8.
Choice A is incorrect. This equation representsaline that has a positive slope, not a negative slope. Choice C is incorrect. This equation representsaline that intersects they-axis at a negative y-value, not a positive y-value, and has a positive slope, not a negative slope. Choice D is incorrect. This equation representsaline that intersects the y-axis at a negative y-value, not a positive y-value.