#3.
Let's first make an equation out of the information given about Frank: y = -15x + 630.
Then, we can plug in 20 for x to find out how many bricks he has after 20 minutes.
-15(20) + 630 = 330
So, Frank has 330 bricks left after 20 minutes. If we look at the graph, find 20 minutes on the x-axis, and follow that up to where it meets with the line, we can see that Francis has only 320 bricks remaining after 20 minutes.
Therefore, Francis will have the fewest bricks left after 20 minutes.
#2.
First, we need a bit of information about both of the functions: the slope and y-intercept. The slope of function W is 1/2, and the y-intercept is -1. The slope of function Z is 1/4, and the y-intercept is -2. Now, let's take a look at the options.
1. False - 1/2 is greater than 1/4
2. True - 1/2 is greater than 1/4
3. False - -2 does not equal -1
4. False - -1 is greater than -2 (closer to 0)
5 & 6. False - The y-value when you plug -4 into function W is -3, and the y-value when you plug -4 into function Z is also -3.
#1.
This problem involves using the slope formula for functions A and B, and finding m in the equation for function C.
Slope of function A = 2
Slope of function B = 3/5
Slope of function C = 3
Therefore, in order from least to greatest is: B, A, C.
Hope this helps!! :)