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在苏科版义务教育课程标准实验教科书数学八年级上册第五章第三节“一次函数的图象”中研究了一次函数的图象:“一次函数y=kx+b(k、b为常数,且k≠0)的图象是一条直线.”例如:在平面直角坐标系中画出一次函数y=2x+1的图象.由所画的图象可以看出:一次函数y=2x+1的图象是一条直线.
In the Suke version of compulsory education curriculum standard experimental textbook eighth grade fifth chapter fifth chapter third “a function of the image ” studied the image of a function: “a function y = kx + b (k, b is a constant and k ≠ 0) is a straight line. ”For example, an image of the function y = 2x + 1 is drawn once in a Cartesian coordinate system. It can be seen from the image that once The image with the function y = 2x + 1 is a straight line.