Answer:
Step-by-step explanation:
Hello!
The objective is to determine if there is a linear association between the price of a mountain bike (Y) and it's the weight (X).
a.
Looking at the Scatterplot the data is dispersed in all quadrants of the graph, at first glance there seems to be some kind of functional relationship between the price and weight of mountain bike bicycles. If you are not too strict maybe there could be a slight negative relationship between them.
b.
The linear regression model is E(Yi)= α + βXi
To find the regression model for this particular set of variables you have to estimate the intercept and the slope.
a= Y[bar] - bX[bar] = 1961.40 $
b=
= -42.99 $/LB
^Yi= 1961.40 - 42.99Xi
$ 1961.40 is the estimated value of the average price if the weight of the mountain bike is zero. (It has no contextual sense)
-42.99 $/LB is the modification of the estimated average price every time the weight of the mountain bike.
c.
In this item, you need yo obtain a value of price for a given value of weight. To do so all you have to do is replace the value on the estimated regression model:
^Y/X=3232= 1961.40 - 42.99*32= $585.72
I hope it helps!
Answer: -8
Explanation: so f(g(-1)) basically means f of g of -1. so we plug in -1 for x in g(x) and that equals 2(-1) + 5. so g(x) = 3. now we have f(3) because it’s f(g(-1)). f(3) = 1 - 3^2, which equals -8.
hope this helps!
Answer:
-3/2
Step-by-step explanation:
lets take coordinates:
(-4,19) and (-2,16)
-4=x1
19=y1
-2=x2
16=y2
so
(16-19)/(-2)--4
-3/2
Hope this helps!
We could represent this as an equation:
47x = $209, where x is the number of lawns mowed.
What we could do is divide 209 by 47 to find out how many lawns Jerry would need to mow. This would give us about 4.4 (when rounded). Since Jerry has to mow entire lawns, we would have to round that up to 5 lawns. Jerry would earn $235 for those, which is more than enough for those new video games.
Answer:
First, I go by finding <em>x</em><em> </em>and <em>r</em>.
After that, put the numbers (ie. x= # and r=#) into the equations. Check it by finding L.H.S and R.H.S. (ie. left hand side and right hand side)
If you are still confused, comment down and I'll try to provide better explanation!