How do you graph y=3/2 x + 3?

2 Answers
Jun 8, 2018

Start with the point ( 0 + 3) then go up 2 and over 3 to point ( 3,5) connect the dots.

Explanation:

The equation is in the slope intercept form which makes this easy

y = mx + b

where m = the slope ( think mountain ski slope)
and b = the y intercept ( think beginning.)

Start at b the beginning

b = ( 0 +3) b is the y intercept where x = 0 and y = 3

Then use the slope 2/3 = y/x

Add 2 to the y value 3 + 2 = 5
Add 3 to the x value 0 + 3 = 3

this gives the second point ( 3,5)

plot the two points and connect the dots with a line, The graph of the equation is done.

Jun 8, 2018

Convert the equation to standard form

Explanation:

Graph:

y=3/2x+3

You need two points to graph a straight line. The x- and y-intercepts are easiest to find, especially when the equation is in standard form.

Convert to standard form, Ax+By=C, by subtracting 3/2x from both sides.

-3/2x+y=3

X-intercept: value of x when y=0

Substitute 0 for y and solve for x.

-3/2x+0=3

-3/2x=3

Multiply both sides by 2.

-3x=3xx2

-3x=6

Divide both sides by -3.

x=6/(-3)

x=-2

The x-intercept is: (-2,0).

Y-intercept: value of y when x=0

Substitute 0 for x and solve for y.

-3/2(0)+y=3

y=3

The y-intercept is: (0,3).

Plot the x- and y-intercept and draw a straight line through them.

graph{y=3/2x+3 [-10, 10, -5, 5]}