Answer: a
Step-by-step explanation:
Subtract the two Y values of X = 2 and X = 4 to find the total difference, then divide by the difference between X=2 and X =4
When X = 2 Y = 9
When X = 4 Y = 64
Difference between the two Y values = 64 -9 = 55
Difference between the two X values = 4-2 = 2
The rate of change = difference in Y divided by difference in X:
55/2 = 27.5
Answer:
it should be (6,-7)
Test it on a 4 quadrant graph yourself if you do not have the same numbers.
25+30x=5x²-10
5x²-30x-35=0
x²-6x-7=0 -7=-7*1, -6=-7+1
(x-7)(x+1)=0
x-7=0, x=7 hours.
x+1=0, x=-1 (we cannot take negative for hours)
So, answer is 7
Check
y=25+30*7=235
y=5x²-10= 5*7²-10=245-10 =235
Answer:
Function 2
Step-by-step explanation:
The slope m is a measure of the rate of change.
The equation of a line in slope- intercept form is
y = mx + b ( m is the slope and b the y- intercept )
Change both functions into this form
- 2x + 5y = 10 ( add 2x to both sides )
5y = 2x + 10 ( divide all terms by 5 )
y = 
x + 2 ← in slope- intercept form
with slope m =
- 6x + 3y = 18 ( add 6x to both sides )
3y = 6x + 18 ( divide all terms by 3 )
y = 2x + 6 ← in slope- intercept form
with slope m = 2
Now 2 >
Thus Function 2 has the greater rate of change
