【考点】线性方程,直线斜率
【难度系数】★★★☆☆
【答案评析】由表中数据可知,f(x)随着x的变化而均匀变化,说明f(x)为线性函数。简便解法为:利用中点坐标公式,x=3是x=0和x=6的中点,则对应的f(3)也是f(0)和f(6)的中点,2f(3)=f(0)+f(6),得出f(3)=(-2+16)/2=7
答案选B
| SAT数学考试知识点解析汇总 | |
【考点】线性方程,直线斜率
【难度系数】★★★☆☆
【答案评析】由表中数据可知,f(x)随着x的变化而均匀变化,说明f(x)为线性函数。简便解法为:利用中点坐标公式,x=3是x=0和x=6的中点,则对应的f(3)也是f(0)和f(6)的中点,2f(3)=f(0)+f(6),得出f(3)=(-2+16)/2=7
答案选B
| SAT数学考试知识点解析汇总 | |
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