Question

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

Answer 1

`y = 2x + 3`

Explanation:

We can find the slope.

`( 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`