Question

A line has a slope of –4 and passes through the point (8, –7). What is the equation of the line in Slope Intercept Form?



Question 11 options:

y = 4x + 25


y = -4x - 25


y = -4x + 25


y = -4x + 32

Answer 1

Straight away you can exclude first because slope here +4. And consider remaining three answers.  

Next step is to calculate y if x = 8 (from point (8,-7))
2) y=-4 *8-25 = -32-25  - it's not -7
3) y=-4*8+25 = -32+25 = -7 - huray! 

Answer: y = -4x + 25

Answer 2

Question 11 options:

B = y - mx
B = -7 -(-4)(8)
B = -7 + 32
B = 25


Equation

y = -4x + 25

Answer is y =-4x + 25