A. The student improperly set up the equation to find the y-intercept
This is because he put y as -2 and x as 1, but the coordinate is (1,-2) not (-2,1)
Hope this helps!
The formula for slope while using two points is
y2-y1
_____
x2-x1
given: (4,5) (x1,y1) and (7,3) (x2,y2)
Plug in
3-5/7-4
solve
-2/3 =slope
<u>Answer:</u>
gradient = =
y-intercept =
<u>Step-by-step explanation:</u>
• The slope-intercept form of an equation takes the general form:
,
where:
m = slope,
c = y-intercept.
• We are given the equation:
To change this into the slope-intercept form, we must make y the subject:
[subtract from both sides]
⇒ [divide both sides by 3]
⇒
• Comparing this equation with the general form equation, we see that:
m =
c = .
This means that the gradient is , and the y-intercept is .
57:90 because you are comparing high gloss to total and not high gloss to flat