in the xy plane,the graph of the function F is a line.if F(2)=7andF(12)=1,what is the value of F(7)=?

分类: 作业答案 • 2022-07-21 22:38:43

问题描述：

in the xy plane,the graph of the function F is a line.
if F(2)=7andF(12)=1,what is the value of F(7)=?

答

F(x)=kx+b
7=2k+b,1=12k+b
k=-3/5,b=41/5
F(x)=-3/5x+41/5
F(7)=-3/5*7+41/5=4