Question

Choose the correct procedure used to graph the equation 3x + 9y = -18 using the intercepts method.

Answer 1

a)Solve the equation for y to get a y-intercept of (0, -2) and a slope of - 1/3. Plot the y-intercept, count the slope to get another point and draw the line that passes through the two points.
b)Choose two different values; plug them into the equation to find the corresponding y-values. Plot the two points and draw the line that passes through the two points.
c)Let x equal zero and solve for y to find a y-intercept of (0, -2). Let y equal zero and solve for x to find an x-intercept of (-6, 0). Plot the two points and draw a line passing through the two points.
d)Solve the equation for y to find an intercept of (-2, 0); solve the equation for x to find a y-intercept of (0, -6). Plot the two points and draw a line passing through the two points.

Answer 2

intercept form will be helpful

Answer 3

so would the answer be d?

Answer 4

yeah, that would be easier to me, at least :D

Answer 5

Yea it would be d but do you understand why?

Answer 6

it would be simpler to solve im guessing ?

Answer 7

Since this is a linear equation. Recall the form: y=x. All you need is 2 points to construct the graph. Therefore, the easiest way to get 2 points is the x intercept and y intercept. To get those, you set your x = 0 and y = 0.

Understand?