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# can someone check my answers , thank you

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1.

2.

3.

im not sure if desmos can be used o check my answer myself, but if someone could check these! thank you

Sep 11, 2020

#1
+112029
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Hi Jenny,

2 are correct and one is wrong.

I think it may be just a careless mistake.

See if you can work out which one is wrong and why it is wrong

Sep 11, 2020
#2
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i am unsure, maybe 3?

jjennylove  Sep 11, 2020
#3
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im very confused, im sorry

jjennylove  Sep 11, 2020
#4
+112029
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You think maybe 3. Let's look at that one.

How do you find the slope of a line?

Try to imagine that only one of the lines is on the graph and the green curve is also not there, that might make it easier for you to see the answer.

If it is too confusing to imagine then draw it on a bit of paper.

Sep 12, 2020
#5
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wouldnt it be B for 3 ? since the slope is 1/1 which is 1

jjennylove  Sep 12, 2020
#6
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wait do we count the 0 as a line? if so it would be  3?

jjennylove  Sep 12, 2020
#7
+112029
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Mmm.

The red tangent and the blue secant both have the same slope.

I will look at the blue secant.

a)   does it have a positive or a negative gradient?

It goes through the points (0,-2)  and  (1,1)

b)  What is the rise between these points?

c) what is the run?

d) So ...  What is the gradient?

Of course, you count the 0 line  :)

Melody  Sep 12, 2020
#8
+112029
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