Use the formula y2-y1:x2-x1
Y2= 8
Y1=-4
X2=4
X1=-12
8-4=4
4-12=-8
Slope is 4/-8 or -1/2
Company A : 0.36 + 0.03m
company B : 0.06m
to find out when they are equal, set them equal to each other and solve for m, the number of minutes
0.36 + 0.03m = 0.06m
0.36 = 0.06m - 0.03m
0.36 = 0.03m
0.36 / 0.03 = m
12 minutes <=== they will be the same at 12 minutes
check...
company A : 0.36 + 0.03(12) = 0.72
company B : 0.06(12) = 0.72
correct
If the current value of the baseball car is 50 times its original value, its original value will be its current value divided by 50.
Let

represent the current value of the baseball card. We know form our problem that $62 is 50 times the original value,

, of the baseball card, so translating this statement to an equation we get:



We can conclude that the original value of the baseball card was
$1.24.