Answer:
The equation of line that passes through (1, 2) and (8,9) in slope-intercept form is: 
Step-by-step explanation:
The slope-intercept form of line is given by the formula:

Here m is the slope and b is the y intercept
Given

First of all, the slope has to be found

Putting m=1 in the equation

Putting the point (1,2) in the equation to find the value of b

The equation is:

Hence,
The equation of line that passes through (1, 2) and (8,9) in slope-intercept form is: 
Expand the left side using the angle sum identity for sine:
sin(<em>x</em> + <em>π</em>/2) = sin(<em>x</em>) cos(<em>π</em>/2) + cos(<em>x</em>) sin(<em>π</em>/2)
cos(<em>π</em>/2) = 0 and sin(<em>π</em>/2) = 1, so the right side reduces to
sin(<em>x</em> + <em>π</em>/2) = cos(<em>x</em>)
as required.
Answer:
F(x) = 2/3x + 3
Step-by-step explanation:
I found this out by first starting off with the equation, f(x) = mx + b. (b is the y intercept, m is the slope.) The y intercept, where the line passes through the y axis, is 3. (f(x) = mx + 3) Now, look at rise over run, and see that the slope is 2/3, since for every one it goes over, it goes up 2/3. your final equation is f(x) = 2/3x + 3
Here is the work with the answer. Hope this helps. God bless