TEST TOMORROW
Objective
Find slope, y-intercept, graph using slope and y-intercept, and write equations using slope and y-intercept.Review FAQ
How do you find the rate of change when they don't give you points?
A line is made up of infinite points so they really did give you points, you just have to look harder. Find a place where the line and 2 grid lines intersect and put a dot there- that is a point you can use.
How can I find the unit rate for a rate of change like 3/4?
You do this the same way we found unit rate for anything, divide the numerator and denominator by the denominator. You will end up with 0.75/1.
Your goal is to find the slope. The easiest way would be to get the problem in Slope-intercept form or y=mx+b. You do this by solving them for y or, in other words, getting y all alone on one side of the equal sign. Once your problem looks like y=mx+b but with numbers for m and b, the number in m's place is the slope.
What's the deal with #4-9 on the practice test?
You need to identify the slope on those. The instructions printed weird.Your goal is to find the slope. The easiest way would be to get the problem in Slope-intercept form or y=mx+b. You do this by solving them for y or, in other words, getting y all alone on one side of the equal sign. Once your problem looks like y=mx+b but with numbers for m and b, the number in m's place is the slope.
i really dont understand stand most of it
ReplyDeleteOk, do you have a specific problem you are having trouble with? Or a topic? I bet there are parts you are doing just fine on!
DeleteIs there any online website where I can use a calculator like the ones we have at school? (*Is stuck with 3/4 divided by 25...*)
ReplyDeletehttps://sites.google.com/site/northwesternhighschoolptsa/free-online-graphing-calculator
DeleteThank you Ms.Lowery!! Also, on problems like #5 (Practice Test) do I divide 2x+9 together or separately?
DeleteSeparately.
Deletecan you please explain #10-11.
ReplyDeleteThank You!
Sorry, my computer did an update. I am downloading the practice test so I can help you.
DeleteAny set of points with the same rate of change between all the points makes a straight line when the rates are simplified. Find the rate of change between different pairs, if they are equal then the line will be straight.
DeleteI also don't understand the last 5 problems in total.
ReplyDeleteThink about slope-intercept form (y=mx+b). On 12 and 13, you were given m, x, and y. You need to find b by plugging the numbers you were given in the right places then solving for b. On 14 and 15, you will have to find the slope then b.
DeleteHi Miss Lowery!So I noticed that on the study guide packit you gave us #6 is alot like that question I was stuck on ,on the test.So I was trying to figure out but I couldnt.Can you help me figure out the answer?
ReplyDeleteSure, how far can you get?
DeleteOops. I don't have a copy of that paper here so I need the problem. It is an equation from 2 points one, right?
DeleteI think so.um the equation says "Lila and Gill went to the autumn fair.THey paid an entry fee and a per-game price.lila played 8 games and paid $17.75 in all.Gil played 11 games and paid $22.25 in all.
ReplyDeleteWrite the y-intercept in coordanite form.Explain what the y-intercept represents in the problem situation."
Okay so I thought mabye you did the whole y2 - y1 over x2 -x1 but I wasnt sure.So I tried plugging that in and put $22.25 -$17.75 over 11 - 8 and got $4.50 over 3 and then I didnt really know what to do.Im not sure If im even doing this right.
You are doing great! Right now you know that the cost goes up $4.50 for every 3 games played. You need to figure out how much it cost to get in, which is the y-intercept for the problem.
ReplyDeleteSo, maybe that $4.50 per 3 games could help you figure out how much those 8 games cost then you could that to find out how much they paid to get in.
Eep! That should say could USE that.
Deletewait could you devide $4.50 by 3. which is $1.5.Which I think means its $1.5 per game?but that doesnt give room for th eprice to get into the fair...
DeleteAt $1.50 each, how much would 8 games cost?
Delete$12.00.Wait so then whats left over is $5.75.And then $1.50 times 11 is is $16.50.So whats left over is $5.75!!!!!!Is that the y-intercept?
ReplyDeleteYes! Spectacular work.
DeleteYayyyyy!!!!:D Thank you so much Miss Lowery!I love your blog!See you tomorrow!
ReplyDeleteThank you for using the blog. Good night.
ReplyDelete