Most likely rates, percents and ratios at a higher level. Also, multiplication and division of fractions at a higher level.
Answer:
y = 5x - 5
Step-by-step explanation:
It appears that the graph intersects the y-axis at (0, -5). This point is the y-intercept of the line.
As we move from (0, -5) to the point (2, 5), x increases by 2 and y increases by 10. Thus, the slope of the line through these two points is
m = rise / run = 10 / 2 = 5.
The slope-intercept form of the equation of a straight line, y = mx + b, becomes y = 5x - 5
Plug slope in the general equation : y = mx + b
y = -x + b
5 = -4 + b
b = 9
Plug y-intercept int the general equation:
y = -x + 9
Answer: y = -x + 9
The answer would be -345 because you multiply first, then add, and last subtract.
To two lines be perpendicular theirs angular coeficients needs to be the opposite inverse, so, we have the line 2x - 7y = 0 => 7y = 2x => y = 2x/7 it have a 2/7 angular coeficient, so the other line need to be the opposite inverse, and it's -7/2
Let's discover the other line:
(y - yo) = m.(x - xo)
(y - 5) = -7/2.(x - 2)
y - 5 = -7x/2 + 7.2/2
y - 5 = -7x/2 + 7
y = -7x/2 + 7 + 5
y = -7x/2 + 12
Let's multiply all the equation by 2.
2y = -7x + 24
Pass -7x
7x + 2y = 24
7x + ky = b
b is 24 and k is 2
