Question 655274: Can someone please help me how to write an equation for each line??
1) y-intercept of -2.1,x-intercept of 3.5
2)through(1.2,5.1),x-intercept of 3.7
please help me! I was sick, so i missed the lesson
Answer by ewatrrr(24785)   (Show Source):
You can put this solution on YOUR website!
Hi,
Using the standard slope-intercept form for an equation of a line y = mx + b
where m is the slope and b the y-intercept.
1) y-intercept of -2.1,x-intercept of 3.5 ||Points: (0,-2.1) and (3.5,0)
y = mx + (-2.1)
y = mx - 2.1
finding the slope m
(0,-2.1) and
(3.5,0) m = -2.1/-3.5 = .6
y = .6x - 2.1
2)through(1.2,5.1),
x-intercept of 3.7 Pt(3.7,0)
(3.7,0)
(1.2,5.1) m = -5.1/2.5 = - 2.04
y = -2.04x + b || Using Pt(3.7,0) to solve for b
0 = 
7.548 = b
y = -2.04x + 7.548
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