Question

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Answer 1

Equation of the graph is y = –9x + 360.

Solution:

Take any two points on the line.

Let the points are (40, 0) and (0, 360).

$x_1=40, y_1=0, x_2=0, y_1=360$

Slope of the line:

$m=\frac{y_2-y_1}{x_2-x_1}$

$m=\frac{360-0}{0-40}$

$m=\frac{360}{-40}$

m = –9

The slope is –9.

y-intercept is the point where the line intersects with the y-axis.

y-intercept = 360

b = 360

Slope-intercept form:

y = mx + b

y = –9x + 360

Equation of the graph is y = –9x + 360.