Question

If f(x)= mx+ c , f (1)=5 and f(-2)=-1​

Answer 1

Answer:

$y = 2x + 3$

Step-by-step explanation:

We can find the slope.

$\frac{ 5 + 1}{1 + 2 } = 2$

so m is 2

$y = 2x + c$

Plug one the equations in to find c.

$- 1 = 2( - 2) + c$

$- 1 = - 4 + c$

$3 = c$

so the equation is

$y = 2x + 3$