Answer:
Option D
Step-by-step explanation:
f(x) = -4x + 2
f(-1) = -4(-1) + 2 = 4 + 2 = 6
To prove:
Solution:
Multiply first term by and second term by .
Using the identity:
Denominators are same, you can subtract the fractions.
Using the identity:
Using the identity:
------------ (1)
Using the identity:
------------ (2)
Equation (1) = Equation (2)
LHS = RHS
Hence proved.
Answer:
To find the slope, you divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points .
Step-by-step explanation:
Khan Academy has videos explaining this on yt.