What do you know about the slope when y2 - y1 = 0 ?
a. the slope is undefined.
b. the slope is zero.
c. the slope is positive.
d. the slope is negative.

B

Step-by-step explanation:

Using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

If y₂ - y₁ = 0 then slope is zero

This applies to a horizontal line parallel to the x- axis

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !

45

step-by-step explanation: