### Present Remotely

Send the link below via email or IM

• Invited audience members will follow you as you navigate and present
• People invited to a presentation do not need a Prezi account
• This link expires 10 minutes after you close the presentation

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

# Graphing using intercepts

lesson for math class
by

## Matt Rzeszutko

on 31 May 2011

Report abuse

#### Transcript of Graphing using intercepts

Graphing using Intercepts Get Out Your Notebooks! lesson 4.3 Vocabulary x-intercept the place on a graph where the line crosses the x axis y-intercept the place on a graph where the line
crosses the y axis ok, let's start with example #1 find the intercepts of the graph of the equation. find the x and y intercepts of the graph of 2x+7y=28 to find the x intercept,
substitute 0 for y and
solve for x 2x+7y=28 write the original equation 2x+7(0)=28 then substitute 0 for y and solve for x x=28/2=14 to find the y intercept, substitute 0 for x, and solve for y write the original equation
2x+7y=28 and substitute 0 for x
2(0)+7y=28 then solve for y
y=28/7=4 the x-intercept is 14, and the
y-intercept is 4 time for example 2! using intercepts to graph an equation step 1: find the intercepts our intercepts are x=14 and y=4 1 2 3 4 5 6 7 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 x-intercept y-intercept step 2: draw the line between the intercepts and you're done! Example 3! using a graph to find intercepts 1 2 3 4 0 0 1 2 3 4 step 1: find where the line crosses the x axis
this is your x-intercept. step 2: find where the line crosses th y axis
this is your y-intercept solving a multi-step problem example 4! step 1: find the intercepts 4x+6(0)=180 x=45 45 is the x intercept 4(0)+6y=180 y=30 30 is the y intercept step 2: graph the intercepts 0 0 10 20 30 40 10 20 30 40 x y step 3: draw the line I have 180 dollars I can use to buy used video games.
some cost \$4 and some cost \$6. A. find the intercepts of the graph of the equation B. graph the equation C. Give four possibilities for the number of each cost videogames i could buy step 4: find 4 combinations some possible combinations are:
(0,30)
(15, 20)
(30,10)
(45,0) For extra practice, you can use page 229-232 in your math book.
(it's not homework)
Full transcript