If the slope of the line passing through (4, -3k) and (k, 8) is 7, then find the value of k

Question

anonymous · Answer

Help me please

campbell_st · Answer

do you know the slope formula...?

anonymous · Answer

Yes

anonymous · Answer

use the slope formula
then
slope of the line

campbell_st · Answer

ok... it its 

$$m =\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$$

you know m = 7 so substitute the ordered pairs.... 

and then just solve for k.... 

when you have substituted the 1st step is to multiply both sides of the equation by the denominator

anonymous · Answer

Okay thank you I have another math question which is 

If f(x) = 2x ( 3 - 1/2x), then does f(6) = 6

anonymous · Answer

Wait * f(6) = 12

campbell_st · Answer

ummm seems a different question...?

campbell_st · Answer

I would have thought 

$$7 = \frac{8 + 3k}{k - 4}$$

multiply both sides of the equation by the deniminator

anonymous · Answer

Yeah it's a different question